Re-enables media library.
Fixes #1047 (nth attempt).

This means ICMP errors will be ignored, which is a Bad Idea.
But people are likely to complain about how it breaks their setup if we
don't ignore ICMP anyway.

These are not confidential, and fairly slow to compute.
(This is much simpler than caching them to disk, and more
 portable-app-friendly)

Patch by Hannes Domani.

from 0.16 to 0.16.1 before bootstrap (unlike the other builders it doesn't
bootstrap the contribs first)

to autopoint for win32

 - ignore HTTP/0.9 clients instead of deadlocking the connection
 - ignore unknown protocol
 - reject incompatible HTTP & RTSP protocol versions
   (HTTP/2.0 does not exist but RTSP/2.0 is currently draft)

to gettextize (eg. if I was building inside a directory called win32)

cross-compiling under linux. -Im4/ changed to -I m4/