modules_k/auth_radius: fixed typo in README

- Fixed authorization return code for authorization failed.  It should
  be 2 instead of 3.  Reported by Ricardo Martinez.

modules_k/auth_radius/README

@@ -227,7 +227,7 @@ modparam("auth_radius", "use_ruri_flag", 22)
      * -6 (nonce reused) - nonce is used more than once;
      * -5 (no credentials) - credentials were not found in request;
      * -4 (stale nonce) - stale nonce;
-     * -3 (authorization failed) - RADIUS responded with Access Reject
+     * -2 (authorization failed) - RADIUS responded with Access Reject
        which may be, for example, due to user not found or wrong password;
      * -1 (error) - some error occured during authorization (see syslog);
 

modules_k/auth_radius/doc/auth_radius_admin.xml

@@ -226,7 +226,7 @@ modparam("auth_radius", "use_ruri_flag", 22)
 			<emphasis>-4 (stale nonce)</emphasis> - stale nonce;
 			</para></listitem>
 			<listitem><para>
-			<emphasis>-3 (authorization failed)</emphasis> - RADIUS responded with Access Reject which may be, for example, due to user not found or wrong password;
+			<emphasis>-2 (authorization failed)</emphasis> - RADIUS responded with Access Reject which may be, for example, due to user not found or wrong password;
 			</para></listitem>
 			<listitem><para>
 			<emphasis>-1 (error)</emphasis> - some error occured during authorization (see syslog);