man/vps.conf.5: typesetting/wording fixes

Bunch of small fixes:
- use bold/italic in SYNOPSYS;
- fix typesetting of vzctl(8) in a few cases;
- fix using 'options' instead of 'option';
- fix using 'parameter' instead of 'option';
- properly typeset space separated lists (such as "ip [ip ...]");
- removed the nonsensical warning about modifying config manually;
- man page date updated.

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