Description:
------------
Sockets' socket_read() left 8 bytes in memory.

Example configure:
'./configure' '--enable-versioning' '--enable-memory-limit' '--with-layout=GNU' '--with-zlib-dir=/usr' '--disable-all' '--with-regex=php' '--disable-cli' '--enable-ctype' '--with-dom=/usr/local' '--with-gd' '--enable-gd-native-ttf' '--enable-gd-jis-conv' '--with-freetype-dir=/usr/local' '--with-jpeg-dir=/usr/local' '--with-png-dir=/usr/local' '--with-xpm-dir=/usr/local' '--with-mysql=/usr/local' '--enable-overload' '--with-pcre-regex=yes' '--enable-posix' '--enable-session' '--enable-sockets' '--enable-tokenizer' '--with-expat-dir=/usr/local' '--enable-xml' '--with-zlib=yes' '--with-apxs2=/usr/local/sbin/apxs' '--with-imap=/usr/local' '--with-imap-ssl=/usr/local' '--prefix=/usr/local' 'i386-portbld-freebsd4.8'

but reproducable on linux too.



Reproduce code:
---------------
function foo(){
	$socket = socket_create (AF_INET, SOCK_STREAM, 0); 
	$result = socket_connect ($socket, gethostbyname ('www.example.com'), 80); 
	$in = "HEAD / HTTP/1.0\r\n\r\n";
	
	socket_write ($socket, $in, strlen ($in)); 
	while ($out = socket_read ($socket, 2048)) { /* .. */ }
	
	socket_close ($socket);
}

foo();
echo memory_get_usage() . "<br>";
foo();
echo memory_get_usage() . "<br>";
foo();
echo memory_get_usage() . "<br>";


Expected result:
----------------
xxxxx bytes.
xxxxx bytes.
xxxxx bytes.

Actual result:
--------------
xxxxx bytes.
xxxxx + 8 bytes.
xxxxx + 16 bytes.
...
xxxxx + (n * 8) bytes.