rts: various speedups

[snakpak]

This pull is a collection of patches. I thought I'd throw it out there to show where I'm at now.

It includes:

• The pending whitespace tidy patch.
• The sleeper patch for out of order sigcont/sigterm, rebased to current master.
• Some svscan tests for the recent sigterm handler addition.
• A Solaris portability fix for the new supervise-start test.
• The addition of a makefifo program, strictly for use in rts. (Is mkfifo portable?)
• Addition of sleeper switches to facilitate better test integration.
• A proposed patch for Issue "svc -d . ; svc -u ." doesn't restart a service if the service doesn't exit quickly #20. Partially fixed in 7569393, but still failed to restart if the service exited 100. This patch fixes that and adds tests for exit codes 0, 1, and 100.
• A change in the way supervise handles throttling, switching to iopause instead of deepsleep, eliminating the one second of unresponsiveness each time a child starts or stops.
• Various rts tweaks, reducing run time to around 10 sec.

And that would bring me to the end of meeting my goals on this -- the "missing sigcont" issue and speeding up the tests -- with a couple extras thrown in just because I already had my head wrapped around it. =)

[josb]

Thanks for addressing #20 !

[snakpak]

As mentioned in #20 the sleeper -d switch wasn't working correctly. That's fixed and rebased in PR #59.