- fix some const warnings
  - fix an "invalid" assert

  Used by mp4 and 3gpp Timed Text 

* ps.c: Base SET_TIME on the current byteposition. This helps seeking in VBR files. Seeking forward will no longer seek backward instead.

(before getopt_long gets the chance to reorder them)

refs 830   (close requires backport)

If the item is not to be preparsed but has enough meta, mark it as preparsed

* Fixes to the streaming chain generator
* network: don't print an error message for EINTR

which is superseded by the Unicode wrappers and GetFallbackEncoding