Add a generic system-wide /usr/share/misc/mime.types file that can be

included in httpd.conf.  httpd(8) now supports both mime.types
flavours with or without semicolon at the end of the line (nginx- or
apache-style).
Discussed with many, with input from halex@
OK halex@

src/etc/examples/httpd.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: httpd.conf,v 1.10 2014/08/06 20:29:54 reyk Exp $
+# $OpenBSD: httpd.conf,v 1.11 2014/08/25 14:27:54 reyk Exp $
 
 #
 # Macros
@@ -70,3 +70,8 @@ server "ipv6.example.com" {
 	listen on 2001:db8::53f6:3eab port 81
 	root "/htdocs/ipv6.example.com"
 }
+
+# Include MIME types instead of the built-in ones
+types {
+	include "/usr/share/misc/mime.types"
+}