vzpid: new option "-p" to show in-container PID(s)

New command line option "-p" means show additionaly the corresponding
in-container PID(s), note CT/Pid column in the following example:

	# vzpid -p 2129
	Pid     CT/Pid  CTID    Name
	2129    333     1020    mysqld

[kir@openvz.org: man page typesetting fix]
2 files changed