This lets us set the suite name in the changelog file to
e.g. sid-experimental.  This way we can share a single debian repo URL
for all versions, but make sure that incoming files are directed to
the correct distro.

This should help with getting people reporting issues to provide us
the exact and complete debugging information we need.  In many cases
we'll be able to have them just run this script against their core
file.

Sofia accepts a value for the TCP keepalive timeout interval via
TPTAG_KEEPALIVE, however it fails to use this value for the Linux
keepalive socket options TCP_KEEPIDLE and TCP_KEEPINTVL.  In fact, on
Linux it enables the sending of TCP keepalives even if tpp_keepalive
is set to zero which would disable Sofia's internal keepalive
mechanisms.  Sofia then uses a hard coded value of 30 seconds for
these keepalive intervals which affects battery life on mobile
devices.

With this commit we harmonize the sending of TCP keepalives on Linux
with other platforms by using the value from TPTAG_KEEPALIVE and not
enabling the sending of TCP keepalives at all if the value of the
parameter is zero.

FS-6104 --resolve

...at least until mod_vlc stabilizes.

This helps to reason about any core dumps that come from libvlc /
mod_vlc.

mod_vlc needs the plugins from vlc-nox to do anything useful.

Currently mod_vlc segfaults without the plugins.  Even after that is
fixed, however, without any plugins mod_vlc can't do its job, so we'll
set a hard dependency here.  I could probably be talked into making
this a Recommends rather than Depends.

FS-6124

FS-6110 --resolve

This is intended to make it easier to describe to users on JIRA how
they should test build patches in a standardized manner and how to
collect a full build log that includes the exact git commit they are
building.

Previously we were including the output of `apr-1-config/apu-1-config
--libs` into CORE_LIBS.  This seemed sensible as CORE_LIBS is added in
the right places to various _LDADD and _LIBADD variables.  However we
also use the value of CORE_LIBS as dependencies in the makefile.
Astonishingly this doesn't seem to cause any issues on most
platforms (or we would have noticed sooner), but it does break things
on Mac.

Thanks-to: Seven Du <dujinfang@gmail.com>

FS-5956 --resolve

There are build issues with mod_spidermonkey on certain platforms, and
we hope to replace it soon anyway.