Http part2 (#4441)

* more uri work based on decompile and tests

* fix includes

* fix loader stubs

* cleanups

* sceHttpParseStatusLine matches decompile and tests

* sceHttpParseResponseHeader implemenation and tests

* try fixing no-internet path in sendrequest

* minimal state machine to support proper erroring of no-internet available

* more improvements

* more implementation based on stephen's comments

* some more fixes based on decompile