FFmpeg is an integral component of ZM. Promote the appropriate libraries to required dependencies.
This reduces the possible build configurations greatly and thus maintenance burden.
The Socket class collides with a class named the same way from liblive555. This confuses the linker and links the wrong object leading to a crash when connecting to the RTSP server.
With this commit a unified structure for includes is introduced.
The general rules:
* Only include what you need
* Include wherever possible in the cpp and forward-declare in the header
The includes are sorted in a local to global fashion. This means for the include order:
0. If cpp file: The corresponding h file and an empty line
1. Includes from the project sorted alphabetically
2. System/library includes sorted alphabetically
3. Conditional includes
Monitors with source type 'remote' can now be accessed over IPv6. This
code uses getaddrinfo(3) now instead of gethostbyname(3) - and changes a
lot of networking stuff which should be tested thoroughly.
