Merge with crew-stable

Work around python 2.5.1 tarfile regression

Merge with crew-stable

Avoid float rounding errors when checking http protocol version.

Work around problem where 'del os.environ["FOO"]' doesn't update environment. test-hook failed since changeset 949516072388 because of this on Solaris 8.

Use python instead of shell printf with \x for test-simplemerge-cmd Needed e.g. to be compatible with Solaris.

Merge with crew.

change tests to use simplemerge by default

polish the simplemerge command; add a test

actually port simplemerge to hg - use bdiff instead of patiencediff; this is a larger change, since bdiff works on 2 multi-line strings, while patiencediff works on 2 lists; - rename the main class from Merge3 to Merge3Text and add a Merge3 class that derives from Merge3Text. This new Merge3 class has the same interface from the original class, so that the tests still work; - Merge3 uses util.binary to detect binary data and raises util.Abort instead of a specific exception; - don't use the @decorator syntax, to keep python2.3 compatibility; - the test uses unittest, which likes to print how long it took to run. This obviously doesn't play too well with hg's test suite, so we override time.time to fool unittest; - one test has a different (but still valid) output because of the different diff algorithm used; - the TestCase class used by bzr has some extras to help debugging. test-merge3.py used 2 of them: - log method to log some data - assertEqualDiff method to ease viewing diffs of diffs We add a dummy log method and use regular assertEquals instead of assertEqualDiff. - make simplemerge executable and add "#!/usr/bin/env python" header