evapi Add link to external library.

(cherry picked from commit 8370ef43f0fbd2ee447ab65c5b5172677a47f644)

modules/evapi/README

@@ -109,7 +109,7 @@ Chapter 1. Admin Guide
 
    The following libraries or applications must be installed before
    running Kamailio with this module loaded:
-     * libev
+     * libev - http://software.schmorp.de/pkg/libev
 
 3. Parameters
 

modules/evapi/doc/evapi_admin.xml

@@ -54,7 +54,7 @@
 			<itemizedlist>
 			<listitem>
 			<para>
-				<emphasis>libev</emphasis>
+				<emphasis>libev</emphasis> - <ulink url="http://software.schmorp.de/pkg/libev">http://software.schmorp.de/pkg/libev</ulink>
 			</para>
 			</listitem>
 			</itemizedlist>