add a proof-of-concept plugin to define alternative services

add a proof-of-concept plugin to define alternative services

example:
NIM A: DVB-C
NIM B: DVB-S (Astra)

NIM B records "Sat 1" (vertical) and cannot play or record "Das Erste". Zapping to "Das Erste" now looks up an alternative-table
(defined by the user) and plays the service "Das Erste" (cable service) on NIM A, which is assossiated to "Das Erste" (sat service).