tests/readlink.py

hgweb: returns 404 for unknow revision instead of 500

I noticed that access to filtered revision returned HTTP 500 code (internal
server error). Investigation shown that it was the case for unknown revision
too. That wrong and we now properly return a 404 for revision not found.

#!/usr/bin/env python

import errno, os, sys

for f in sys.argv[1:]:
    try:
        print f, '->', os.readlink(f)
    except OSError, err:
        if err.errno != errno.EINVAL:
            raise
        print f, 'not a symlink'

sys.exit(0)