separate config parser functions.
add .gitkeep
change comment
use lighttpd-1.4.32 now.
refact.
 - WebSocket-TCP Proxy does not handle subprotocol and locale.
   => use WebSocket Proxy instead.
 - type section is renamed into base64 section
 - rename some file names and functions.
   s/base64/mod_websocket_base64/, s/sha1/mod_websocket_sha1/, s/connector/socket/ etc.
 - use googletest
   => not tested all yet.
 - move config_parser functions into supplement.

 next, implement tests
 - handshake, frame, socket
   mod_websocket.c will be tested with jstest-driver.
add .gitkeep
add extern "C"
reduce includes and check HAVE_xxx
enable to work without pcre
revise code.
 - add static
 - fix BUG
   used MOD_WEBSOCKET_FRAME_LEN63 instead of MOD_WEBSOCKET_FRAME_LEN63_CNT
fix typo
 - no need time_t cast
fix typo and revise comment etc.
revise log comments.
fix BUG.
 - segv when handler_ctx == NULL
impl handshake test
surpress compile warning.
surpress warnings.
enable to make check on Ubuntu
add frame_test
not show DEBUG LOG