cmogstored 1.3.0rc2 - fixes since rc1, systemtap

The Status: header is no longer returned on HTTP responses.  All known
MogileFS clients parse the HTTP status response correctly without the
need for the Status: header.  Neither Perlbal nor nginx set the Status:
header on responses, so this is unlikely to introduce incompatibilities.
The Status: header was originally inherited from HTTP servers which had
to deal with a much larger range of (non-compliant) clients.

SystemTap support is mostly fleshed out.  There are some bundled awk
scripts which should make better sense of the all.stp which logs just
about everything.

Raising aio_threads now correctly increases ioq capacity.  This
regression was only introduced in the 1.3.0 rc series, as ioq
was not in 1.2.x.