Given Ruby already supports Kernel#syscall, I wonder if we should
support something a generated syscall.rb file in the stdlib with
all the available syscall numbers exported as constants:

	SYS_setfsuid = 138
	SYS_setfsgid = 139
	...

This could kill off a lot of C extensions :)

I've been happily using Danga::Socket + Sys::Syscall in Perl the past
few years.  Sure there have been occasional problems, but I still prefer
aalways having the source file with me without worrying about
mis-installed objects (a frequent source of bug reports on redmine),
compile times, etc...