Improve reading from external data source for session id creation.

Improve generating the string representation of the md5 session id.

Nuke some warnings.

add an interface for registering storage modules at run-time.

Patch from Sascha that abstracts session serializers. WDDX extension
now implements the encode/decode functions and registers them with
the session module.

- Change macros from V_ to VCWD_ because of AIX name clash

- use get_current_key_ex() in order to receive key length and not having
- to use strlen() everywhere.

compile was broken, new argument?

buf is gone. Don't reference it.

Replace another sprintf

Nuke calls to sprintf, snprintf, strcat, strcpy and rely on
memcpy and smart_strs.

- Fix copyright notices with 2001

Use MAKE_STD_ZVAL/FREE_ZVAL to handle zval memory allocation.

Use zval_ptr_dtor instead of zval_dtor/FREE_ZVAL pair.

Submitted by: Andi Gutmans

More instances of s/efree/FREE_ZVAL/

(PHP session_unset) Return early, if no session was started.

PR: #8354

Heads up people!

Updated the get_current_key() API - the relevant authors, please take
a look at the updated code and make sure it's ok...

Whitespace fix and initialize ret properly

Move "replace value" logic to Zend

Fix #3261 - variables declared as "global" in function do not get the right
value after session_start.

Const'ify part of sapi_request_info.

query_string, post_data, path_translated, request_uri, auth_user,
auth_password and argv0 are modified, so they cannot become const.

Add support for serializing references.
@- Add support for serializing references (Stas)
# WDDX and shared memory functions not covered yet

Initial steps to move the INI mechanism to the Zend engine

Allow to send secure cookies

Add session_adapt_url().

session_unset() now cleans up $HTTP_SESSION_VARS as well.