Use QUILT_PATCHES and warn about subject mismatches
This commit does to much, but I was too lazy to split it.
If no series file is given as command line parameter and QUILT_PATCHES
is set use $QUILT_PATCHES/series.
If the Subject: line does not match our expected format from the patch
file name print a warning. Add option -s to silence this warning.
Remove left-over, unreachable code
Add qorphan to SEE ALSO section in qclean man page
We reference qorphan in the man page.
Skip comments and empty lines in qheaders
Fix option handling in qheaders
Remove orphaned backups after removing the patches
Do not use a temporary file
Fix SEE ALSO section in man pages
Fix outdated tool description in the README
Test early that necessary files exist
Quote ASCII minus in man pages