configs/voicemail.conf.sample - Make mailcmd sample text more explicit

Made the wording a bit more explicit. Didn't really change the meaning.
........

Merged revisions 408876 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@408877 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/voicemail.conf.sample

@@ -169,7 +169,8 @@ pagerdateformat=%A, %B %d, %Y at %r
 ; Short 24h date format for pager use
 ;pagerdateformat=%T %D
 ;
-; You can override the default program to send e-mail if you wish, too
+; Using the mailcmd option, you can specify what command is called for
+; outbound E-mail. The default is shown below.
 ;
 ;mailcmd=/usr/sbin/sendmail -t
 ;