Process multiple NIT-other tables

[ghost]

When multiple NIT-other tables (for multiple network IDs) are being published in the transport stream, try to process all of them rather than the previous behaviour of processing only the first one seen.

Every NIT-other table received will be processed until one of the following conditions is true:

• A NIT-other section is received with a network ID and version number matching one we've already processed, and all NIT-other tables we've seen are complete (we've received and processed all the sections)
• TIMEOUT_SEC has elapsed

Not having a definitive way to know how many different NIT-other tables are being published, this assumes that the NIT-other tables are transmitted as a repeating loop with network IDs in the same order each time. This matches the observed behaviour of every real-world NIT-other stream I've examined.

[ghost]

This works well in my testing, but I'm limited to only three satellites and no DVB-C or DVB-T. It could really stand to be tested more extensively by someone better equipped.

[AbuBaniaz]

UK Terrestrial was fine. However crashed on DVB-C. Maybe a little tweak required. Enigma2_crash_2016-09-13_20-48-36.log.txt

[AbuBaniaz]

As per your email, deleting line 212 resolved the crash nit_other_completed = True