5060fc23 attempted to fix#68948 by treating all non-uri streams
as non-blocking, however php://fd/* streams (which includes stdin)
may block if the other end of the IPC isn't finished.
This represents a partial revert to the pre RC6 state,
but includes an escape hatch for php://memory and php://temp
streams which are local to the current process.
This also restores stream_set_chunk_size test to previous state.
* master:
Use per-request heap instead of system one
Extend zend_register_class_alias_ex() with additional argument to allow creating persistent or per-request aliases
Makrk persistent resources and references with GC_PERSISTENT flag
Prohibit direct update of GC_REFCOUNT(), GC_SET_REFCOUNT(), GC_ADDREF() and GC_DELREF() shoukf be instead.
Added mactros to validate reference-counting (disabled for now).
These macros are going to be used to eliminate race-condintions during reference-counting on data shared between threads.
The zend_signals_activate() function is called in php_request_startup()
even if `--disable-zend-signals` is used. This causes uninitialized
variables to be used on ZTS builds.
This was removed in 7.1 in c870633. Removing guards from the SAPIs
should be fine, but removing the guard from main/main.c prevents anyone
using the static embedded library to integrate PHP into their programs.
For more details, see the "Additional remark" section in
https://bugs.php.net/bug.php?id=74149
The apache_hooks SAPI has been removed since PHP >= 7.0 and there is no
need to have two different php_request_startup definitions.
Also php_request_startup_for_hook() and php_request_shutdown_for_hook() functions
are not used in the PHP source code directly anymore. They are out of sync and
are not touched when making changes to the shutdown sequence.
The php_start_sapi() function was therefore not used anymore and is
removed.
