inotify: workaround ENAMETOOLONG by using symlinks
If we can't create the unix socket because the path is too long
we create the socket in a temporary directory and symlink it into
the repo.
Fix
issue1208
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
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