Fix Mark Schnitzius's URL in README.md files

As noted in commit 3958bbdb04:

    Updated URL for author as it has changed. It's very little on his
    page and the only page that suggests it is his is the ioccc.html
    page. I couldn't find anything else.

2004/schnitzi/README.md

@@ -1,10 +1,11 @@
 # Best Non-Use of Curses:
 
-    Mark Schnitzius
-    Eclipse Group
-    94 Richardson St
-    Albert Park, VIC 3206
-    Australia
+Mark Schnitzius  
+Eclipse Group  
+94 Richardson St  
+Albert Park, VIC 3206  
+Australia  
+<http://computronium.org/ioccc.html>  
 
 ## To build: