add session counter and make all sessions hang up elegantly on shutdown

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1788 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/freeswitch.xml

@@ -1,6 +1,12 @@
 <?xml version="1.0"?>
 <document type="freeswitch/xml">
   <section name="configuration" description="Various Configuration">
+    <configuration name="modules.conf" description="Modules">
+      <settings>
+        <!--Most channels to allow at once -->
+        <param name="max-sessions" value="1000"/>
+      </settings>
+    </configuration>
     <configuration name="modules.conf" description="Modules">
       <modules>
         <!-- Loggers (I'd load these first) -->