committing uwe's autoinstall notes, as requested by deraadt;
improve the question part (second line) of ask_which to actually include
the name of what we're asking for, rather than 'Which _one_ ...'
Improves things a lot for the autoinstaller.

ok rpe@
bz#2161 - fix AuthorizedKeysCommand inside a Match block and
rearrange things so the same error is harder to make next time;
with and ok dtucker@
Correct spin timeout detection in __mp_lock debug code.

OK pirofti@ krw@ miod@
sync
no more stty(3), so point to tty(4);
as advised by deraadt
no more regexp(3), so point to regex(3);
as advised by deraadt
no more libcompat;
When a relay fails, let the scheduler update all envelopes in the
holdq as if they tempfailed.
document "verify" keyword and "authtable" option on "listen" rules
warn when failing to parse a field
move defines around
minor tweaks;
Rename 'struct drm_obj' to 'struct drm_gem_object' to reduce the diffs with
Linux.

ok jsg@
In split_address(), make 'i' a size_t.  ok millert@
Provide a prototype for ngstore() and include <unistd.h> for getopt().
ok millert@
Properly initialize 'transp' to appease the compiler.  ok millert@
bogus ';'
missing init
oops, sgtty.h stays for a little longer