poll: namespace and extend api including new event enum

Author: bukka

ext/standard/config.m4

@@ -418,6 +418,7 @@ PHP_NEW_EXTENSION([standard], m4_normalize([
     image.c
     incomplete_class.c
     info.c
+    io_poll.c
     iptc.c
     levenshtein.c
     libavifinfo/avifinfo.c
@@ -432,7 +433,6 @@ PHP_NEW_EXTENSION([standard], m4_normalize([
     pageinfo.c
     password.c
     php_fopen_wrapper.c
-    poll.c
     proc_open.c
     quot_print.c
     scanf.c

ext/standard/config.w32

@@ -28,14 +28,14 @@ EXTENSION("standard", "array.c base64.c basic_functions.c browscap.c \
 	crypt_sha512.c  php_crypt_r.c " + (TARGET_ARCH != 'arm64'? " crc32_x86.c" : "") + " \
 	datetime.c dir.c dl.c dns.c dns_win32.c exec.c \
 	file.c filestat.c formatted_print.c fsock.c head.c html.c image.c \
-	info.c iptc.c link.c mail.c math.c md5.c metaphone.c microtime.c \
+	info.c io_poll.c iptc.c link.c mail.c math.c md5.c metaphone.c microtime.c \
 	net.c pack.c pageinfo.c quot_print.c soundex.c \
 	string.c scanf.c syslog.c type.c uniqid.c url.c var.c \
 	versioning.c assert.c strnatcmp.c levenshtein.c incomplete_class.c \
 	url_scanner_ex.c ftp_fopen_wrapper.c http_fopen_wrapper.c \
 	php_fopen_wrapper.c credits.c css.c var_unserializer.c ftok.c sha1.c \
 	user_filters.c uuencode.c filters.c proc_open.c password.c \
-	poll.c streamsfuncs.c http.c flock_compat.c hrtime.c",
+	streamsfuncs.c http.c flock_compat.c hrtime.c",
 	false /* never shared */,
 	'/DZEND_ENABLE_STATIC_TSRMLS_CACHE=1');
 ADD_SOURCES("ext/standard/libavifinfo", "avifinfo.c", "standard");