raise exception if running mock and user not member of mock group (BZ# 630791)
    call setsid() to kill controlling terminal in chroot (BZ# 672713,501096)
    Went back to creating /dev/tty and /dev/ptmx in all chroots (BZ# 683111)
    Fixed problem where mock was not constrained to the chroot (BZ# 669733)
    Fix typo in /dev/tty creation code for EPEL{4,5} (BZ# 675803)
    From Marko Myllynen <myllynen@redhat.com>:
    updated SCM integration (BZ# 670453)
    from Masatake YAMATO <yamato@redhat.com>:
    fixed invocation typo in exception.py (BZ# 634555)
    From Jan Vcelak <jvcelak@redhat.com>:
    updated selinux plugin (BZ# 573111, 667190)
    From Levente Farkas <lfarkas@lfarkas.org>:
    adding missing macro for epel-5 configs (BZ# 695298)
    From  Mathieu Bridon <bochecha@fedoraproject.org> and
    Remi Collet <fedora@famillecollet.com>:
    fix chroot cleanup issues (BZ# 668222)
    fix ccache ownership issues (BZ# 700983)
    From Dan Horák <dan@danny.cz>:
    added s390 back as legal arch for s390x (BZ# 678047)
    From Ville Skyttä <ville.skytta@iki.fi>:
    Fixes shell escaping issue by using tuples rather than strings