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

config: make remap actually work

util: stop overwriting sha1, overwrite _fastsha1 instead Some modules (like revlog) would import util.sha1 as _sha1. This defeats the purpose of having util.sha1 overwrite itself with a faster version -- revlog would end up always calling the slow version. By always delegating to util._fastsha1 we avoid this at the cost of an extra (but unconditional) indirection.