Support wildcards in SBBSecho areamgr requests

Some FTN echomail area manager programs (e.g. hpt, BBBS?) support wildcards in their area-tag specifiers, e.g.

%rescan *    <- rescan all mail in every connected area
%rescan * 200  <- the same but only the last 200 messages in each area
%rescan * 365 days  <- the same, get 365 days worth of mail in each area  

%RESCAN is the command to "resend" message, and here is the except from the
help:

 %RESCAN 541.LOCAL            <- Rescan area
 %RESCAN OS2.*                <- same
 %RESCAN linux.develop.ger 200      <- Rescan the last 200 mails
 %RESCAN linux.develop.ger 30 days  <- Rescan mails for last 30 days