Word-smithing.

Double negatives confuse people.
Update text for recent changes
Add rlm_date and panic.gdb to the rpm specfile
Merge pull request #508 from TheMysteriousX/v3.0.x

RPM specfile is out of date
Search for multiple substitutions in panic strings
The variadic arguments implementation on some systems really doesn't deal well with writing to va_lists further up the stack...