lib/srdb1/schema/mtrees.xml: schema upgrade

- Added tvalue to unique index, because each prefix can now be
  associated with more than one value.

lib/srdb1/schema/mtrees.xml

@@ -9,7 +9,7 @@
 
 <table id="mtrees" xmlns:db="http://docbook.org/ns/docbook">
     <name>mtrees</name>
-    <version>1</version>
+    <version>2</version>
     <type db="mysql">&MYSQL_TABLE_TYPE;</type>
     <description>
         <db:para>This table is used by the mtree module to load values in shared memory trees at start up. More information about the mtree module can be found at: &KAMAILIO_MOD_DOC;mtree.html
@@ -51,9 +51,10 @@
     </column>
 
     <index>
-        <name>tname_tprefix_idx</name>
+        <name>tname_tprefix_tvalue_idx</name>
         <colref linkend="tname"/>
         <colref linkend="tprefix"/>
+        <colref linkend="tvalue"/>
         <unique/>
     </index>