doc: fix manual page

make: simplify makefile, advertise clang

make: don't fix CC variable

backlight: use _XOPEN_SOURCE=700

backlight: search for card in Linux

backlight: fix for FreeBSD and pet a warning

make: use POSIX only commands

misc: add missing files

misc: refactor

misc: add .hgignore file

(0) -10 +10 tip

mercurial