criu --help: PID is not used for restore command

A couple of fixes related to the fact.

This is an addition to commit 43ce038eSigned-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

crtools.c

@@ -360,7 +360,7 @@ usage:
 "Commands:\n"
 "  dump           checkpoint a process/tree identified by pid\n"
 "  pre-dump       pre-dump task(s) minimizing their frozen time\n"
-"  restore        restore a process/tree identified by pid\n"
+"  restore        restore a process/tree\n"
 "  show           show dump file(s) contents\n"
 "  check          checks whether the kernel support is up-to-date\n"
 "  exec           execute a system call by other task\n"
@@ -376,7 +376,7 @@ usage:
 "Dump/Restore options:\n"
 "\n"
 "* Generic:\n"
-"  -t|--tree PID         checkpoint/restore a process tree identified by PID\n"
+"  -t|--tree PID         checkpoint a process tree identified by PID\n"
 "  -d|--restore-detached detach after restore\n"
 "  -s|--leave-stopped    leave tasks in stopped state after checkpoint\n"
 "  -R|--leave-running    leave tasks in running state after checkpoint\n"