compile fixes & update of win32 dsp

fopen wrappers cleanup
- comfiguration is now done by an ini parameter
instead of a compile time option
- the implementations of the three standard wrappers
now live in se

fopen wrappers cleanup
- comfiguration is now done by an ini parameter
instead of a compile time option
- the implementations of the three standard wrappers
now live in seperate files in ext/standard
- the compiler is happy again, no more warnings

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- Fix memory leak.

- Fix V_CHDIR_FILE() to only chdir() when a directory part is specified.
Use this instead of broken php_dirname() in fopen-wrappers.c

- Remove unneeded IS_SLASH() definition.

- Fix doc_root problem. If you need to limit under which directories the
scripts should reside use open_basedir.

- Use IS_ABSOLUTE_PATH() so that this will work correctly under Windows

Added IPv6 support to php_fopen_url_wrap_ftp (EPSV and php_hostconnect())

Never trust snprintf return value

renamed hostconnect() to php_hostconnect()

using the new hostconnect() for the http wrapper

- Use emalloc() for opened_path now. This was a potential leak before.
- This patch has potential to break stuff but I tested it as much as I
- could. Fixes should be easy.

- Remove redundant IS_SLASH
- Reverse config.w32.h patches
- Use IS_ABSOLUTE_PATH() in one place in fopen-wrappers.c

- Missed a space

- Fix bug when using safe_mode and doc_root together

Cleaning up some mess

- Remove old/deprecated version of expand_filepath

- Change PHP_SEPARATOR to PHP_DIR_SEPARATOR

Provide PHP_SEPARATOR which expands to the default directory separator
on the target platform.

Remove php_realpath from build.

It was broken and should not be used in any way.

- Centralize more fopen-wrappers functionality.

- The beginning of an attempt to cleanup fopen-wrappers.
- I started with trying to localize the V_FOPEN's so that we can have a
- version which won't really open the file for include_once/re

- The beginning of an attempt to cleanup fopen-wrappers.
- I started with trying to localize the V_FOPEN's so that we can have a
- version which won't really open the file for include_once/require_once to
- work faster and have less chance of a race which would cause a fd leak.
- What I did will, therefore, change but I want to do this step by step
- because the code is extremley messy so first of all I want to make sure
- that the isolating of the V_FOPEN code doesn't break anything.
- How about moving URL stuff out of this file?
- php_fopen_url_wrapper() copy and pasted the second part of
- php_fopen_wrapper() (incorrectly). Please try not to copy&paste code but
- centralize functionality. Need to think of a nice way to nuke one of the
- copies and have both functions use the same one.

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Standartize full path handling - everything now goes via expand_filepath
Add errno to open_basedir checking function

Virtualize realpath, chmod, chown and utime
This should fix #5935 and #5904
@- Virtualize realpath, chmod, chown and utime (Stas)

If we can't find a protocol in URL wrapper, try it as a filename (fix #5931)