configure now regards additional CFLAGS and LDFLAGS set as environment variables.
CTRL+C and CTRL+BREAK on console can be caught by setting a handler function with sapi_windows_set_ctrl_handler().
proc_open() on Windows can be passed a "create_process_group" option. It is required if the child process is supposed to handle CTRL events.
OPcache now supports an arbitrary number of separate caches per user via the the INI directive opcache.cache_id. All processes with the same cache ID and user share an OPcache instance.
The stat implementation has been refactored.
Note that both values are derived from the system and provided as-is on 64-bit systems. On 32-bit systems, these values might overflow the 32-bit integer in PHP, so they're fake.