inputChangedHandler only reads from the current MIM input, which isn't
set until the next playlist callback is received.
This actively probes the current input, sets it, and inform potential
listeners
refs #14162

This is unoptimal but could be improved using C++11 (or memory barriers
for double check locking)
fixes #14885

hvc1 is reserved for streams with VCL only

bitstream reader will always return 0 if no bytes

Avoid linking with -lrt if not needed (e.g. recent GNU/libc),
simplify, and enable linking other library than libvlccore.

When not implicit, limits are mentioned in *_id description.

Useless then suspicious use in omxil.c might incur a regression.

Tries strongest match against decoder record

Like valgrind, the address sanitizer generates unusable leak reports if
plugins are unloaded.

Run 'make lcov' to produce the coverage report in the lcov/.
This requires lcov installed and the --enable-coverage configure flag.