compare snprintf return value with -1. this isn't really necessary because
int promotion rules guarantee the correct result when compared with sizeof,
but it is perhaps easier for some people to understand it this way.
from Doug Hogan.
calling this "encryption" makes me cringe. "slightly obfuscated" is better.
remove all crypt choices other than bcrypt. ok afresh1 deraadt
If a client is killed while suspended with ^Z so has gone through the
MSG_EXITED dance, don't try to resume it since a) it's pointless and b)
the tty structures have been cleaned up and tmux will crash.