squid: bump to version 4.3

squid: bump to version 4.3

Drop get_certificate test avoidance patch; upstream made the test cross
compile friendly in commit 958ae827cabf (Fix cross-compile issues with
SSL_get_certificate())

Drop the patch adding <time.h>; the code does not call time() anymore.

Restore netfilter support under musl libc. Squid build fine with current
musl version.

Cc: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>