man/vzctl.8: fix SYNOPSYS, beautify using .SY/.OP/.YS

These options lead to better formatting.

While working on SYNOPSYS:
* add all options for set command
* add options for start, stop, and restart
* add delete alias for destroy

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed