- No signal translation is needed. Our signals match the OSF/1 signals
- an OSF/1 sigset_t is 64 bits. Make certain to use all 64-bits of it.
We'd previously only used the lower 32 bits. This was mostly harmless
as I don't know of an OSF/1 apps which use any signals > 31. However,
the alpha Linux ABI uses the osf/1 signal routines and threaded linux
apps tyically use signals 32 and 33 to comminicate with the manager
thread, so it is important we preserve the upper 32-bits.
Reviewed by: marcel (at least in principal)