run-tests: split tests/blacklist in tests/blacklists/* 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

Put here definitions of blacklists for run-tests.py

Create a file per blacklist. Each file should list the names of tests that you
want to be skipped.
File names are meant to be used as targets for run-tests.py --blacklist
option.
Lines starting with # are ignored. White spaces are stripped.

e.g. if you create a blacklist/example file containing:
 test-hgrc
 # some comment
 test-help
then calling "run-tests.py --blacklist blacklists/example" will exclude
test-hgrc and test-help from the list of tests to run.