Massive VE -> container rename

Only do it in user-visible messages and comments.
Also:
* SWsoft->Parallels
* Copyright years update
* ip -> IP
* VE id, veid -> CT ID
* cpu -> CPU
* 2level quota -> second-level quota
* Some comments changed for better clarity
* Some error messages changed for better clarity
* Remove references to non-existent man pages
* Fixed VE_STATE description (can not be 'stopped')
* Some whitespace management (use tabs instead of spaces in some places)

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
58 files changed