We've been having trouble the last few days / week with SRC align, particularly when the guardian thinks SRY is locked, then just rails the SRM, but still thinks that SRY is locked, so starts doing ASC things with nonsense error signals.

I've increased the thresholds for the trigger matrix.  It looks at POPA DC, and the thresholds were 0.3, 0.25. The flashes regularly were going above 0.3, but the light level when the SRM is totally misaligned is about 0.28, so we weren't ever triggering off.  I've changed it so that it turns on the SRCL trigger at 0.5 (nicely aligned the light level is about 0.6), and turns off the trigger at 0.3.  With statistics of N=1, this seems okay.

Sheila (at JeffK's wise suggestion) also increased the watchdog trip levels for SRM's middle stage, since the SRM keeps tripping when we go to DOWN after this railing situation happens.  We have now increased the threshold on the middle stage to match the lowest stage thresholds.