STDIO_DIRECT_FD appears to work. Remove old implementation.
strerror() always exists in Pike.
Removed some more unused code in encode.c.

Try to force noinline on the decode_error function.
Changed return type of get_{inherit_,}storae to void*

This makes it possible to remove quite a lot of casts.
Removed a few casts
There is always a System.getrusage.
There is always a String.hex2string.
There is always a chmod.
Fixed some misfirings from Pers script.
SSL.sslfile: Renamed packet_max_size to fragment_max_size.