url: replace uses of hasattr with safehasattr or getattr

subrepo: use safehasattr instead of hasattr Some of these instances could be rewritten as clever getattr(x, y, default) ladders, but that felt like it impeded readability too much to be worth the modest efficiency gain.

statichttprepo: replace hasattr with getattr

walkrepos: use getattr instead of hasattr for samestat

revlog: use getattr instead of hasattr

lsprof: use getattr instead of hasattr

keepalive: use safehasattr instead of hasattr

hgweb: move remaining hasattr calls to safehasattr

wsgicgi: use getattr instead of hasattr

httprepo: use getattr instead of hasattr

help command: use safehasattr instead of hasattr

hgweb_mod: use safehasattr instead of hasattr

hg: use safehasattr instead of hasattr

encoding: use getattr isntead of hasattr

dispatch: use safehasattr instead of hasattr

debugignore: use getattr instead of hasattr

cmdutil: use safehasattr instead of hasattr

byterange: replace uses of hasattr with getattr

bookmarks: use getattr instead of hasattr

hgext: replace uses of hasattr with util.safehasattr

globally: use safehasattr(x, '__iter__') instead of hasattr(x, '__iter__')

globally: use safehasattr(x, '__call__') instead of hasattr(x, '__call__')

safehasattr: new function to work around hasattr being broken

windows: check util.mainfrozen() instead of ad-hoc checks everywhere

notify: rewrite user documentation The main intent is to turn the reference help into a configuration walkthrough. It also fix several things: - Do not suggest to use it for commit notifications, it cannot work - Fix notify.strip default value - Mention that subscriptions can be setup in Mercurial configuration files - Improve notify.strip and notify.domain documentation

cmdserver: repo.invalidate() on every runcommand This will trigger the filecache and recreate every cached property that was changed by something other than this cmdserver instance (e.g. by running 'hg commit' at the cmdline).

help: add "web/logoimg" setting description

filecache: fix check-code complaint

localrepo: unify tag related info into a tagscache class

localrepo: make invalidate() walk _filecache