Quote SUDO value during propagation, allowing `doas -n' to be correctlyhonored which I use while running regress. The same principle is alreadyapplied to the PYTHON variable here.
Skip sosplice loop test if Perl packages are not installed.
Test that local UDP broadcast packets to 255.255.255.255 are handledcorrectly by socket splicing. They generate an ELOOP error.
Increase file descriptor limit to allow long chains of splicedsockets in one test process.
Create chains and loops of spliced tcp and udp sockets. Send datathrough them and check that MAXLOOP is triggered in kernel.