[Xxm-releases] release v1.1.9.300

[Stijn S. (develyoy) <de...@yo...>]

v1.1.9.300
- sourceforge repository caught up with previous private repo, so version
build number will now follow svn revision number
- support for If-Modified-Since, If-Unmodified-Since headers
- serving content-files uses FILE_FLAG_SEQUENTIAL_SCAN
- xxmHttp: switched to custom winsock wrapper
- xxmHttp: central holding for 'keep' connections awaiting requests
- xxmLocal: fixed issue with first request for a static file after reload