bookmarks: better fix for issue2016 (lookup infinite recursion) 741290486877 partially reverted by Patrick Mézard <pmezard@gmail.com>

merge/progress: marking strings for localization

verify/progress: using gerund to indicate action and adding units

progress: dropping superfluous space from units

check-code: add 'no tab indent' check for unified tests and fix the offending tests accordingly

url: validity (notBefore/notAfter) is checked by OpenSSL (issue2407) Removing the check from our code makes https with cacerts check work with Python < 2.6.

test-https: test web.cacerts functionality

serve: fix https mode and add test The https mode failed in super because BaseRequestHandler is an old-style class. This introduces the first test of https client/server functionality - and "hghave ssl". The test is currently only run on Python 2.6.