Each cache file is now unloaded as soon as the cache directory scan is
complete. The data is not needed anymore past that point.

As the module descriptor is referenced into the main module list
(without copying).

There is no need to keep this around after the plugins scan. Also,
there is no need to check --reset-plugins-cache if caching si disabled
(--no-plugins-cache).

64-bits timestamp is useless if the OS only provides 32-bits.

For error other than congestion (EAGAIN, EWOULDBLOCK, ENOBUFS, ENOMEM),
check the socket type. If the socket is a datagram, retry. Otherwise,
the socket is connection-oriented and we assume the connection broke,
close it.

This needs testing (my DVB driver is not CI-capable).

The missing definitions are 3-days old...

 - remove always zero overruns counter,
 - constify message pointer.

In practice, multiple headers cannot happen. Only VLM input and LUA
interface use this hack.

Message items are more often than not not rereferenced, and hardly ever
rereferenced more than once. Demand-copying will be faster in most
common circumstances (especially built-in console or logger).

stream_filter/httplive.c: #EXTINF: accepts integer (version < 3) or floating points based on protocol version.

Update logic in parse_SegmentationInformation() to accept float values
for duration as mentioned in later version of the draft specification.

The variable stream_t *s in function parse_SegmentInformation() was not used.

Split up parse_SegmentInformation() into two functions:
parse_SegmentInformation() - parse #EXTINF to get duration
  parse_AddSegment() - adds new segment

The parse_SegmentInformation() did both functions before and this
made some HTTP Live URL not work as expected. The splitting up of
these functionalities solves this issue.

And remove trailing spaces...

This is not tested due to lack of use cases. Please test and report
bugs or limitations BEFORE final 1.2.0 release (or shut up).

Currently channels cannot be remapped and samples format must be S16N.

This saves two function calls per memset() since there are no optimized
implementations of memset() at all.