mention @mutlusun as freebsd maintainer

Mic92 · Mic92 · commit b6c8546a5de8 · 2017-01-26T10:50:48.000+01:00
diff --git a/README.md b/README.md
@@ -777,6 +777,10 @@ Vicious written by:
 
 - Adrian C. (anrxc)        \<anrxc sysphere.org\>
 
+Maintainer of the Freebsd Port:
+
+- @mutlusun
+
 Vicious major contributors:
 
 - Benedikt Sauer           \<filmor gmail.com\>
