v2:
1) parser updated to properly parse strings like this: "11:%x 1:%d"

Protobuf generic show function now accept a string with pretty specificators.
The string have to look like below (an example):

"0:%d 3:%u"

where numbers with colon specifies field number (the same number as in
proto-file) and "%[a-zA-Z]" specifies output format.
If pretty specificator for specified for a field, then it will be used for
output instead of generic hexidecimal view.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>