Little change to send-pr: allow user choose MTA

[Silas Silva <silasdb%gmail.com@localhost>]

Hi there,

"/usr/sbin/sendmail -oi -t" is hardcoded in send-pr script, but not
everybody uses sendmail.  That is because I'm proposing the attached
patch, that is adopted by FreeBSD (don't know about other systems).

What do you guys think?  May I open a PR?

P.S.:  That would require a change in the man page too, to reference the
variable.

-- 
Silas Silva

--- send-pr.orig        2011-02-25 09:22:33.000000000 -0300
+++ send-pr     2011-02-25 09:23:38.000000000 -0300
@@ -54,7 +54,7 @@
 
 # What mailer to use.  This must come after the config file, since it is
 # host-dependent.
-MAIL_AGENT="/usr/sbin/sendmail -oi -t"
+MAIL_AGENT="${MAIL_AGENT:-/usr/sbin/sendmail -oi -t}"
 
 # How to read the passwd database.
 PASSWD="cat /etc/passwd"