Add osdep-cgywin.c as a copy of osdep-linux.c, from J Raynor.
Make -a append to top buffer if -b is not specified.
In four byte UTF-8 sequences, only three bits of the first byte should be
used. Fix from Koga Osamu.
Merge branch 'master' of ssh://git.code.sf.net/p/tmux/tmux-code
Don't crash with a zero-length argument to setb, from J Raynor.
Remove LocalWords.