mcwebserver: some updates
mcwebserver: add response, outputcache, and md5 support
add md5
md5: add MD5String API
mcwebserver: add cgi-cache support
[mcwebserver]add Response_Parse_From_Stream and update CGI cache
mcwebserver: bugfix Is_Cached
mcwebserver: bugfix for Response_Append_Body; add Console; add Conf
bugfix: Response_Parse_From_Stream and Get_Cache_FilePath
mcwebserver: decode querystring only when the request is not a cgi one
mcwebserver: add PHP_CGI environment variable