fix spelling error. If you are using conference events over event socket, you…

fix spelling error.  If you are using conference events over event socket, you will need to fix your code as well.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7239 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_conference/mod_conference.c

@@ -44,7 +44,7 @@ static int EC = 0;
 
 /* Size to allocate for audio buffers */
 #define CONF_BUFFER_SIZE 1024 * 128
-#define CONF_EVENT_MAINT "conference::maintenence"
+#define CONF_EVENT_MAINT "conference::maintenance"
 #define CONF_DEFAULT_LEADIN 20
 
 #define CONF_DBLOCK_SIZE CONF_BUFFER_SIZE