#1342 Support for multiple comparisons in a single 'case'

[Marzo Sette Torres Junior]

In conversations, there are cases when multiple strings
should result in the same dialog. The CMPS opcode
supports this comparison, but the 'case' command in
UCC does not. I am thus asking for the ability of having
something like

case "option 1", "option 2":

where selecting either "option 1" or "option 2" result in
the same dialog.