Put man pages where they belong.

Index: setupbase.py
--- setupbase.py.orig
+++ setupbase.py
@@ -145,7 +145,7 @@ def find_data_files():
     Just man pages at this point.
     """
 
-    if "freebsd" in sys.platform:
+    if "freebsd" or "openbsd" in sys.platform:
         manpagebase = pjoin('man', 'man1')
     else:
         manpagebase = pjoin('share', 'man', 'man1')