dirstate: flush _lastnormal when we see newer filesystem times

util: add Mac-specific check whether we're in a GUI session (issue2553) The previous test assumed that 'os.name' was "mac" on Mac OS X. This is not the case; 'mac' was classic Mac OS, whereas Mac OS X has 'os.name' be 'posix'. Please note that this change will break Mercurial on hypothetical non-Mac OS X deployments of Darwin. Credit to Brodie Rao for thinking of CGSessionCopyCurrentDictionary() and Kevin Bullock for testing.

rebase: allow for rebasing descendants onto ancestors on different named branches So far we've been denying rebasing descendants onto ancestors, but there are situations in which this kind of operation makes perfect sense to me. Let's say we have made a commit (or more), that belongs to branch 'dev', on top of the named branch 'stable': ... a (stable) - b (dev) but then we realize that b should belong to branch 'stable'. In these cases a rebase means: "move these csets from named branch A to named branch B" and there isn't a valid reason to deny it. This patch basically doesn't block it, if source and destination are on different named branches. The old behaviour still applies for rebases across the same named branch. Can you think of any tricky corner cases in which this new behaviour could lead to problems? (I bet there are tons of them...) By the way, I created a brand new .t because I feel there should be more tests I can't think of at the moment.

bdiff.c: rename all variables which hold a hash value to "hash"

bdiff.c: use unsigned arithmetic for hash computation Signed integer overflow is undefined in C.

bdiff.c: cast to unsigned char when computing hash value

bdiff.c: make all local functions static

merge with stable

debugbundle: fix up long line caught by check-code

wireproto: avoid naked excepts