diff --git a/inc/md2html.cfg b/inc/md2html.cfg
index c27368ae6..3b9470565 100644
--- a/inc/md2html.cfg
+++ b/inc/md2html.cfg
@@ -14,7 +14,7 @@
# where "file_glob" is a Bash Extended Glob (not a regular expression).
# and where "cfg_options .." are zero or more configuration file options.
#
-# File paths are evaluated from the top of the repo. A leading / in a file_glob
+# File paths are evaluated from under the top of the repo. A leading / in a file_glob
# is assumed to be under the topdir directory.
#
# For information on Bash Extended Globbing, see:
@@ -32,7 +32,7 @@
#
# Here the "command" first processes any command line options, then
# any cfg_options from this file from a 1st match of a given file_glob,
-# followed by an optional -- and then zero of more filename_arg arguments.
+# followed by an optional -- and then zero of more "filename_arg" filename arguments.
##################
# import options #
@@ -48,52 +48,76 @@
# -n go thru the actions, but do not update any files (def: do the action)
# -N do not process file, just ignore the file (def: process the file)
#
-# -C dir cd dir (def: cd to "git rev-parse --show-cdup" only
-# if "git rev-parse --is-inside-work-tree" is true)
-# -d topdir set topdir (def: if "git rev-parse --is-inside-work-tree" is true
-# topdir is output of "git rev-parse --show-toplevel")
-# -I dir inc files are under topdir/dir (def: inc files are under topdir/inc)
+# -i dir inc files are under topdir/dir (def: inc files are under topdir/inc)
#
+# -d topdir set topdir (def: if "git rev-parse --is-inside-work-tree" is true, then
+# topdir is output of "git rev-parse --show-toplevel")
# -D def "def" is default HTML phase name (def: "default" is default phase name)
#
+# -c md2html.cfg Use md2html.cfg as the configuration file (def: use inc/md2html.cfg)
+# -C dir cd dir (def: if "git rev-parse --is-inside-work-tree" is true, then
+# cd to the output of "git rev-parse --show-cdup")
+#
# -H phase=name use "phase.name.html" for HTML phase (def: use phase.default.html)
-# -H phase=. disable processing for HTML phase "phase" (def: process HTML phase)
+# -H phase=. ignore processing for HTML phase "phase" (def: process HTML phase)
#
# -b tool before pandoc processing, add tool to in HTML phase 20 (def: do not output before pandoc)
-# -b . disable use of "before tool" (def: do not use "before tool")
+# -b . ignore use of "before tool" (def: do not use "before tool")
# -B option run the "before tool" with option (def: do not add any options)
#
# -p pandoc path to pandoc wrapper used in HTML phase 21 (def: use inc/pandoc.sh)
-# -p . disable use of pandoc, just output content (def: process with pandoc wrapper)
+# -p . ignore use of pandoc, just output content (def: process file with pandoc)
# -P option run pandoc with option (def: do not add any options)
#
# -a tool after pandoc processing, add tool to in HTML phase 22 (def: do not output after pandoc)
-# -a . disable use of "after tool" (def: do not use an "after tool")
+# -a . ignore use of "after tool" (def: do not use an "after tool")
# -A option run the "after tool" with option (def: do not add any options)
#
# -s token=value substitute %%token%% with value except in HTML phases 20-29 (def: do not substitute any tokens)
-# -S failure to replace a %%token%% is not an error (def: exit non-zero if non-substituted tokens)
+# NOTE: token may not contain a / (slash), and value may not contain a ; (semicolon)
+# -S failure to replace a %%token%% is not an error (def: exit non-zero for non-substituted tokens)
#
# -o tool Use the output of tool to generate option lines (def: do not)
# -o . disable use of "output tool" (def: do not use an "output tool")
# -O option run the "token replace tool" with option (def: do not add any options)
#
# -e exitcode force exit with exitcode (def: exit based on success or failure of the action)
+# -E string output string, followed by newline, to stderr (def: do not)
#
# The output from "-b tool" (unless -b .) will be used in HTML phase 20 before pandoc processing.
# The output from pandoc (unless -p .) will be used HTML phase 21.
# The output from "-a tool" (unless -a .) will be used in HTML phase 22 after pandoc processing.
#
-# The output from "-o tool" (unless -o .) is to add zero or more cfg_options if they were from this configuration file.
-# The intent of "-o tool" is to output 0 or more "-t token=value" options. The "option tool" may
-# output other options, any output if another "-o tool" or another "-O option" will be ignored.
-#
# The "tool" path (for -b tool, -a tool, -o tool), if not absolute, is assumed to be under topdir.
-# If the "tool" path is "." (dot), then the use of the tool is disabled for the given file.
+# If the "tool" path is "." (dot), then the use of the given tool is ignored.
#
-# A "tool" (for -b tool, -a tool, -o tool) is given the path of the file that matched the "file_glob"
-# (see above) as an argument. File the argument, any "options" (see -B option, -A option, -O option)
-# are added to the "tool" command line.
+# When the "tool" (for -b tool, -a tool, -o tool) is executed, it is given any "options"
+# (see -B option, -A option, -O option), followed by "--", and ending in the path from the topdir
+# to the file that matched the "file_glob".
+#
+# Command line options are evaluated in order. For example, when "-e exitcode" is evaluated, the application
+# will exit with the "exitcode" value. If one wishes to also output a message to stderr, the "-E string"
+# must come BEFORE any "-e exitcode" in the command line.
+#
+# The command options are evaluated in the follow phases:
+#
+# 0. collect command line options, up to but not including any "--" or up to the command line filename argument(s)
+# 0a. ((evaluate all phase 0 options))
+#
+# 1. collect "cfg_options" from the first md2html.cfg line where "file_glob" matched the filename argument
+# 1a. ((evaluate all phase 1 options))
+#
+# 2. collect output of "-o tool" from phase 0a and then from phase 1a, in the order collected
+# 2a. ((evaluate all phase 2 options, except that any new "-o tool" is ignored))
+#
+# The "-o tool" should NOT output any "-o tool" options as "-o tool" is NOT RECURSIVE.
+# Command line options output from a "-o tool" are accumulated for phase 2,
+# and then evaluated in phase 2a. However, any "-o tool" found during phase 2a WILL BE IGNORED.
+#
+# Most command line options override earlier copies of the same option. However in the case of
+# "-H phase=name", later "-H phase=name" only overrides an earlier use of "-H" for the same "phase" only.
+# In the case of "-s token=value", later "-s token=value" only overrides an earlier use of "-s"
+# for the same "token" only.
#
# While above list is not a complete list of options, it does list options that are required of
# tools that use this configuration file.
@@ -118,9 +142,9 @@
#
# Phases 11-19 are reserved for future use.
#
-# 20. <>
-# 21. <>
-# 22. <>
+# 20. ((insert before pandoc tool output))
+# 21. ((insert pandoc tool output))
+# 22. ((insert after pandoc tool output))
#
# Phases 23-29 are reserved for future use.
#
@@ -176,6 +200,7 @@
/2012/tromp/how.md -H topnav=up2index -o inc/subst.default.sh
/2013/hou/doc/example.md -H topnav=up2index -o inc/subst.default.sh
/2014/endoh1/spoilers.md -H topnav=up2index -o inc/subst.default.sh
+/2015/burton/road.to.obscurity.md -H topnav=up2index -o inc/subst.default.sh
/2015/burton/spoilers.md -H topnav=up2index -o inc/subst.default.sh
/2018/burton2/discrepancies.md -H topnav=up2index -o inc/subst.default.sh
/2018/ferguson/rpm.md -H topnav=up2index -o inc/subst.default.sh
@@ -206,7 +231,7 @@
# Exit 9 for any markdown file that we have not previously configured
-*.md -e 9
+*.md -E "markdown file does not match any md2html.cfg line" -e 200
# Last, everything else is silently ignored