This extension has always had correctness issues and has been
unmaintained for years. It is now removed in favor of the third-party
hgwatchman which is maintained and appears to be correct.
Users with inotify enabled in their config files will fall back to
standard status performance.
Following discussions with Gilles Morris [1], it seems that it is preferable to
use several blacklist files in a blacklists/ directory. It is easier to add an
unversioned file for experiments than modifying a tracked file.
Also fall back to a simpler syntax, giving up ConfigParser, now that section
names are not needed anymore.
And allow --blacklist parameter to be a complete path, instead of only one
of the filenames contained in tests/blacklists/
[1] http://www.selenic.com/pipermail/mercurial-devel/2009-December/017317.html