etc: add modules_k to search path of modules

(cherry picked from commit 974e91436a5cf2bdab0f0e6d9d94d4425c2320ac)

etc/kamailio.cfg

@@ -105,7 +105,7 @@ port=5060
 ####### Modules Section ########
 
 #set module path
-mpath="/usr/local/lib/kamailio/modules/"
+mpath="/usr/local/lib/kamailio/modules_k/:/usr/local/lib/kamailio/modules/"
 
 /* uncomment next line for MySQL DB support */
 #m#loadmodule "db_mysql.so"