Unfortunately KEY_COFFEE is the canonical name in linux/input.h, and the more
sensible KEY_SCREENLOCK is an alias. Manually override this particular case,
since it's better to have "screenlock" in keymaps.
However, we still keep the automatic filtering for the general case, to avoid
introducing this problem again when input.h changes.
More than one key name was mapped to the same key, due to linux/input.h
defining some aliases (in particular, KEY_HANGUEL, KEY_SCREENLOCK,
KEY_MIN_INTERESTING). These caused hash table collisions.
Changed the generation of the tables to ignore these aliases, and updated all
keymaps to use the canonical name.
This was detected by llvm-clang-analyzer. Thanks to Lennart Poettering for
doing these checks and pointing this out!
https://launchpad.net/bugs/426647
