run-tests: lock popen wait/poll
In python2.4, any call to Popen() may attempt to wait on any active
process, and wait is not thread-safe. Make it thread-safe.
See http://bugs.python.org/issue1731717 for details.
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing:
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.