Fixed links.

Author: y82

xml/en/security_advisories.xml

@@ -16,7 +16,7 @@
 All nginx security issues should be reported to
 <link url="mailto:F5SIRT@f5.com">F5SIRT@f5.com</link>
 or via one of the methods listed
-<link url="https://github.com/nginx/nginx/blob/update_security_file/SECURITY.md">here</link>.
+<link url="https://github.com/nginx/nginx/blob/master/SECURITY.md">here</link>.
 </para>
 
 <para>

xml/homepage.xml

@@ -20,7 +20,7 @@ Originally written by <link url="http://sysoev.ru/en/">Igor Sysoev</link>
 and distributed under the
 <link url="../LICENSE">2-clause BSD License</link>.
 Enterprise distributions, commercial support and training are
-<link url="enterprise.html">available from F5, Inc.</link>
+<link doc="en/enterprise.xml">available from F5, Inc.</link>
 </para>
 
 <para>