Xen supports on_crash actions coredump-{destroy,restart}.  libvirt
cannot parse config returned by xend that contains either of these
actions

xen52 # xm li -l test | grep on_crash
    (on_crash coredump-restart)
xen52 # virsh dumpxml test
error: internal error unknown lifecycle type coredump-restart

This patch adds a new virDomainLifecycleCrash enum and appends
the new options to existing destroy, restart, preserve, and
rename-restart options.

* src/xenapi/xenapi_utils.h (createVifNetwork): Delete prototype.
* src/xenapi/xenapi_utils.c (createVifNetwork): Change signature,
and use virAsprintf.  Detect allocation failure.
(createVMRecordFromXml): Adjust caller.

Parsing is stricter now and doesn't accept trailing characters
after the actual value anymore.

* cfg.mk (msg_gen_function): Add xenapiSessionErrorHandler.
* po/POTFILES.in: Add src/xenapi/xenapi_driver.c
* src/xenapi/xenapi_driver.c: Mark strings for translation.
* src/xenapi/xenapi_utils.c (xenapiUtil_ParseQuery):

Signed-off-by: NJiri Denemark <jdenemar@redhat.com>