Added headers_sent() function

License update

conv_proto *.[ch]

* Finally commit that -q patch
* Refine SAPI built in header support
* Use DllMain() in ISAPI to clean after threads and initialize tsrm/sapi as soon as possible.

* Finalizing the PHP version of SAPI. Support POST and cookies among other things.
* Fully implement ISAPI support - POST and cookies among other things.
* Almost completely rewrote phpinfo(

* Finalizing the PHP version of SAPI. Support POST and cookies among other things.
* Fully implement ISAPI support - POST and cookies among other things.
* Almost completely rewrote phpinfo(). Allow modules to easily display their
information in phpinfo() without modifying phpinfo() itself (prototype for
the module info function was changed, thus the large amount of updated module
files).
* Initial extended SAPI support for Apache, completely untested.
* CGI now uses SAPI fully as well.

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Fixes

Get CGI to work with the new headers code.
Now Apache is the only interface that doesn't use it.

Added initial headers support in SAPI
*untested*
It definitely broke the thread-safe CGI, it may have broken other stuff as well.

* Get the Apache module to compile again
* Get rid of php3_rqst, use SG(server_context) instead (there's still Apache-specific code,
but it nuked a global)

* Plenty of thread safety and Win32 work.
* Changed PHP4 to compile as a DLL, both ISAPI and the the CGI run with the same DLL.
* Switched to using the DLL runtime library under Win32. PHP w

* Plenty of thread safety and Win32 work.
* Changed PHP4 to compile as a DLL, both ISAPI and the the CGI run with the same DLL.
* Switched to using the DLL runtime library under Win32. PHP will NOT work if
compiled against the static library!
* Removed yesterday's php4libts project (with php4dllts, it's obsolete).

This *does* affect thread-unsafe Windows as well - the thread unsafe CGI is also
dependant on the thread-unsafe DLL.

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A lot of cleanups... Removed old thread-safe code and other redundant code and files

Remove redundant code

Thread-safe header_is_being_sent

Remove tls.[ch]

moved fdf, hyperwave, informix and some smaller files