Merged from trunk 5447:5459

Merged from trunk 5447:5459

Try to create DISTDIR before disabling fetch due to it's nonexistence.  Thanks
to astinus for reporting.

add support for scanning of build logs for common issues #111436 (SpankMan)

Allow - in elog module names (genone)

undo (genone)

When using the spawn's returnpid parameter, manually remove the returned pids
from portage_exec.spawned_pids.

Use os._exit instead of sys.exit in a forked child process.

Make sure stderr is flushed since os._exit doesn't flush stdio buffers.

Make sure stderr is flushed since os._exit doesn't flush stdio buffers.

Implement distlocks for --getbinpkg so that it works properly when
parallel-fetch is enabled.  Thanks to Brent Baude <ranger@gentoo.org> for
reporting.

Export EBUILD_PHASE="" when running misc-function.sh in order to prevent bogus
phase values coming from ${T}/environment.  Thanks to solar for reporting.

When fetching metadata from a binhost, reconnect if the http server closes the
connection before sending a valid response.  Thanks to ranger for reporting.

Make sure that myid is defined for the previous commit.

svn path=/main/branches/prefix/; revision=5460