When CRIU is started in RPC mode ('criu swrk') it used to ignore all
command-line options and configuration files. This moves the jump to RPC
mode after the configuration file parsing to enable configuration.

With this configuration files are now also evaluated in RPC mode and it
is possible to change the behavior of CRIU via the configuration file if
used via RPC.
Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>