rel-html: fix next release mode updates

The linux-next based releases can have mod updates,
so for example for compat-drivers we can have
compat-drivers-2013-03-07 and an assumption was
made we'd always have a -1 release, followed by a
possible -2 release. In practice we've only been
making one release per day though so the mod update
is blank. Fix this by making the regexp that captures
the release mode update as a digit. While at it update
the stable release regexps too to use digit for the
regexp.

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
rel-html: add the 3.9 kernel as supported

This updates both the kernel and compat-drivers
configuration files. This is the only expected
effort required to update support for a new kernel
release. We can later add support to even infer
this, that should be easy.

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>