test-convert-bzr: tweak sed hack to preserve timezone in 'bzr log' output

zeroconf: remove unwarranted execute bit

test-convert-bzr: use sed instead of awk The run-tests.py script has a list of required tools and awk is not one of them -- luckily it could be replaced by sed in this case.

convert/bzr: handle Bazaar timestamps correctly (issue1652).

dispatch: remember loaded extensions in a real set

gpg: use reverse kwarg to sort sigs in reversed order

util: simplify pipefilter and avoid subprocess race The subprocess module is not thread safe. Spawning a thread to read the output leads to exceptions like this when Mercurial exits: Exception exceptions.TypeError: TypeError("'NoneType' object is not callable",) in <bound method Popen.__del__ of <subprocess.Popen object at 0x9ed0dcc>> ignored The bug is already reported in the Python bug tracker: http://bugs.python.org/issue1731717

Removed unnecessary call to dict.keys.

gpg: fix traceback in revs{} display code

util: kill unused Popen3