- (djm) [commit configure.ac defines.h sshpty.c] don't attempt to use
   vhangup on Linux. It doens't work for non-root users, and for them
   it just messes up the tty settings.
 - (djm) [misc.c] Use CLOCK_BOOTTIME in preference to CLOCK_MONOTONIC
   when it is available. It takes into account time spent suspended,
   thereby ensuring timeouts (e.g. for expiring agent keys) fire
   correctly. bz#2228 reported by John Haxby
revert a diff I didn't mean to commit
 - (djm) [Makefile.in] typo in path