Improve documentation; add M. Flaschen to authors.

I removed any mention of wfErrorLog() supporting tcp:// URIs. As far as
I can determine, we don't use this functionality anywhere, and I have no
idea how it would behave.

Added Matthew Flaschen to authors list in EventLogging.php in
recognition and thanks for good advice and good patches.

Change-Id: I25405fd84455b4848022680599f3ad5babe7ce4c