Port to Python 3.

All scripts and modules have been ported to Python 3 and appear to
work.  Some changes to the lighttpd configuration were needed.

web/recent.cgi

@@ -1,12 +1,16 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # CGI script creating page of recent games
 
 import sys
 import time
 import rlgalldb as rlgall
 
+# It is assumed that sys.stdout uses UTF-8 encoding.  If this is not the case,
+# configure the Web server to set the LC_CTYPE environment variable to a UTF-8
+# locale.
+
 # The required header
-sys.stdout.write("Content-type: text/html\r\n\r\n")
+sys.stdout.write("Content-Type: text/html; charset=utf-8\r\n\r\n")
 # The top of the page
 sys.stdout.write(rlgall.phead.format("Recent Games"))
 sys.stdout.write(rlgall.ptop);