Fix manpage path in FreeBSD

FreeBSD stores manpages under ${PREFIX}/man (defaults to /usr/local/man)
rather than ${PREFIX}/share/man.

setupbase.py

@@ -162,6 +162,9 b' def find_data_files():'
     Just man pages at this point.
     """
 
+    if "freebsd" in sys.platform:
+        manpagebase = pjoin('man', 'man1')
+    else:
     manpagebase = pjoin('share', 'man', 'man1')
 
     # Simple file lists can be made by hand