[FEATURE] Add IP filtering

Allow for filtering devlog entries on IP address upon logging.
Make it possible to reuse devIPmask global configuration value
if so desired.

Resolves: #2859
Releases: 3.0
Change-Id: I3d52a1984a9d683a99fd934536e9ff8c5730ac3c
Reviewed-on: http://review.typo3.org/35499
Reviewed-by: Francois Suter <francois@typo3.org>
Tested-by: Francois Suter <francois@typo3.org>