Add alt code to 2005/mynx and format fix README.md

Instead of the original code scanning for https (which it did not) I
made the version that does an alt code. This should have been done
originally but I did not think about it at the time quite unfortunately.
Still it would be nice to be able to use https with it.

I noted a way that one might be able to get it to work - stunnel, though
it's been years since I've used it so it might not be a solution to the
problem.

Updated .gitignore with files in source/ subdirectory in case configure
is run.

To make sure that make from source/ works I copied the mynx.c to the
source/ directory. I guess I could have updated the configure script but
that seems like it would take more effort than it would be worth.

Format fix README.md.

2005/mynx/Makefile

@@ -114,8 +114,8 @@ OBJ= ${PROG}.o
 DATA= source/configure source/configure.in entities.txt source/makefile.in
 TARGET= ${PROG}
 #
-ALT_OBJ=
-ALT_TARGET=
+ALT_OBJ= ${PROG}.alt.o
+ALT_TARGET= ${PROG}.alt
 
 
 #################