[PATCH] Resend: Fix for bug #17414 (PHP_4_3)

Hi. I'm again sending this small patch that fixes bug #17414. As I said earlier the actual bug is within glibc LinuxThreads implementation. NPTL implementation does not have this bug. The problem is that pthread_key_delete does not properly clear the TLS variable if the thread manager isn't started (it is started when ever first thread is started). Since Apache2 prefork-mpm does not start threads this bug shows up always. The work around is to manually clear the TLS entry. Otherwise the TSRM will get old TLS values after Apache2 restart leading to segfault. Since most of the current Linux systems are using glibc with this bug it would be really, really, really great if this patch would commited to PHP. Since it is unlikely that all the people will update their glibc (which by the way isn't patched yet). So PLEASE, please, please apply this patch. Or atleast explain me why not. This is so simple patch that it shouldn't be hard to see that it doesn't break anything. Cheers, Timo