safety belt : scan_directory() can return without setting arr to a valid value

OS2 and Android NDK fixes

Note that in Android NDK st_mtime is long unsigned int

Correctly handle _CRT_SECURE_NO_WARNINGS already being set in project se...

Fixed Memory Leak

Added PATCH to list of valid HTTP Methods.

Fix remove_double_dots_and_double_slashes removing all the dots leading http server to serve wrong URI

If the uri is something like '/js/...jquery.js', remove_double_dots_and_double_slashes will remove the 3 dots and the http server will serves the /js/jquery.js file.
remove_double_dots_and_double_slashes should check if a dot or double dots is followed by a slash (or backslash) and only remove this to avoid disclosure attack.

Enable building of example/Makefile on Win32

Compile fix

fix compiler warnings for 64 bit compilation