First working filters implementaton.

Only downstream filters are supported currently, i.e. no result
set filtering can be done.

A crude QLA (Query Log All) filter is included as a test harness only
Addition of session filter tracking in order to allow the show session
command to call the diagnostic entries points of the filters in the
session.

Slight improvements to the two example filters and a fix to the
trim routine.
Correction to list filters command output
Merge branch 'develop' into MAX-65

Conflicts:
	server/core/config.c
Addition of API modinfo implementation for filters
Addition of the module utilities functions
Merge branch 'develop' into MAX-65
A filter parameter fix and a new filter, the regex filter.

The regexfilter is an example of a query rewriting filter that uses
regular expressions to match the SQL text and allows a replacement text
to be used for each match of the regular expression.

Regexfilter has no special SQL undertanding, it merely uses the features
avialable inthe regex library to perform matches.

Statements that span multiple packets are not supported by the regex
filter.
Fixed for typo in modutil.h

Addition of timestamps to the query log produced by the QLA filter