Expanded functions for manipulation of headers, based on Regular Expressions

%header.set.matchFromSubject(hdr,regex,group)%
%header.append.matchFromSubject(hdr,regex,group)%
%header.prefix.matchFromSubject(hdr,regex,group)%

%header.set.matchFromBody(hdr,regex,group)%
%header.append.matchFromBody(hdr,regex,group)%
%header.prefix.matchFromBody(hdr,regex,group)%

%header.delete(hdr,regex)%

hdr: One of the following list {subject | to | from | cc | bcc | reply-to}

regex: A regular expression within double quotes, e.g. "You got an email from
.* \((\b[a-zA-Z0-9._+-]+@[a-z0-9.-]+\.[a-z]{2,4}\b)\)" - Note that this
function supports match groups.

group: The number of the match group, type 0 for inserting the match from the
complete string.

Notes
=====

The header.delete function will work within the field and can be used to remove
unnecessary prefixes such as "Re: " from the subject line.

If no match is found the header will not be deleted or modified in any way.
Therefore it is important to do a visual check on all fields before you send of
your emails. No error messages will be issued when no match is found. Prefix
and append will check whether the value already exist and avoid duplication.
The prefix command should not be used with address fields, instead use append
to add more recipients.

Created an attachment (id=8313) [details]
1.5 prerelease 58

(From update of attachment 8313 [details])
Here is a test version which adds the latest requested function which can be
used for cleaning up subject lines. Example:

%header.delete(subject,"(Fwd: |Re: )")%

will delete all English Forward and Reply prefixes from the subject line.

Created an attachment (id=8436) [details]
1.5 prerelease 199

Fixinig [Bug 26512] which caused every other use of identical
%matchTextFromSubject()% expressions to be blank (2nd, 4th, 6th... results)

Setting to Resolved Fixed with official Release 1.5