Horde::logMessage -> Horde::log

This existed as of Horde_Core 2.0.0
Horde::img -> Horde_Themes_Image::tag
phpdoc
Horde::loadConfiguration is deprecated
Not needed
Horde::callHook -> Horde_Core_Hooks#callHook

Horde::hookExists -> Horde_Core_Hooks#hookExists
correctly get value of all_rulesets
Move HordeMap initialization code to a different library

This doesn't belong in Horde::. It is a very specific configuration used
in only a few places.

At this point, nothing should probably ever be added into Horde:: again.
For the core libraries that are loaded on pretty much every page, it is
worthwhile in keeping them as small as possible for performance purposes.
phpdoc
bump dependency
Move flist select generation to view templates
Move IMAP validation code into UI library
Move script-related UI methods out of Ingo:: and into Ingo_Script_Util
Use Horde_Stream methods to access stream, when possible
coding style
Much more efficient creation of filters page
Have internal registry cache use a single shared array
Cache results of a bare Horde_Registry#getAuth() call

Testing on the Ingo rule page, this results in ~3% speedup (44ms -> 9ms;
313 calls to getAuth() on my installation for this one request).
Don't normalize when retrieving ftree element unless absolutely needed

When listing mailboxes from Ingo, eliminates ~2% of script time.
Cache results of Horde_Registry#checkExistingAuth() calls

Also... only do global checks once per access.