Adds a test that checks if the working copy parent and the working copy are in a
good state if an exception happens between the time the working copy parent is
set and the time the actual updates are recorded in the dirstate.
test-dirstate.t fails on AIX in the absurd date test. AIX touch errors on
any date prior to 1970. AIX mktime() gives an error on such dates, so the
problem is deeper than touch and attempts to work around touch in Python
failed.
Give up. Add an AIX test to hghave and skip the absurd date test on AIX.
When running on a 32bit system or with a touch command that only accepts
32bit dates, the following happened:
$ touch -t 250001011200 a
touch: invalid date format `250001011200'
Dates and times that are outside the 31-bit signed range are now
compared modulo 2^31. This should prevent it from behaving badly with
very large files or corrupt dates while still having a high
probability of detecting changes.
Globbing is usually used for filenames, so on windows it is reasonable and very
convenient that glob patterns accepts '\' or '/' when the pattern specifies
'/'.
