Make chan_zap reloadable (bug #2637)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4023 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CREDITS

@@ -59,6 +59,8 @@ Thorsten Lockert - OpenBSD, FreeBSD ports, making MacOS X port run on 10.3,
 	dialplan include verification, route lookup on OpenBSD, various other
 	bugs. tholo@sigmasoft.com
 Brian West - ODBC support and Bug Marshaling  
+Josh Roberson - chan_zap reload support, Advanced Voicemail Features, other misc. patches,
+		and Bug Marshalling. - josh@asteriasgi.com, http://www.asteriasgi.com
 William Waites - syslog support, SIP NAT traversal for SIP-UA. ww@styx.org
 Rich Murphey - Porting to FreeBSD, NetBSD, OpenBSD, and Darwin.
 	rich@whiteoaklabs.com  http://whiteoaklabs.com