fix experimental web site links in experimental index.html
sync CNAME with https://github.com/ioccc-src/winner/blob/master/CNAME
improve .gitignore files
Added to each .gitignore file, comments on how to sort.
Put into winner .gitignore files, ignore *.dSYM files.
Put into winner .gitignore files, ignore indent.c,
indent.o and indent files. This is done so that the
winner directory can more self contained.
We did not put into winner .gitignore files, however,
excludes of .-files as found in the top level .gitignore file.
As .-files are not allowed by mkiocccentry, the top level
.gitignore file remains sufficient.
Added to year level .gitignore files, excludes of
mkentry or iocccsize files as needed.
Sorted (via sort -d -u) all .gitignore file.
Due to the fact we now have .orig.c files and thus the possibility of
winner.orig or prog.orig being built I have updated all the .gitignore
files so that these files ignored. This was done with the following
shell commands, for reference:
for i in $(find 19* 200* 201[0123] -mindepth 2 -maxdepth 2 -name .gitignore) ; do echo $(dirname "$i"|sed -e 's,[0-9]\{4\}/,,g').orig >> "$i"; done
for i in $(find 201[4-9] 2020 -mindepth 2 -maxdepth 2 -name .gitignore) ; do echo prog.orig >> "$i"; done
and the two commands is because it was only in 2014 that the winning
entries were renamed to prog so prog.orig is the correct glob.