exec: Don't assume request presence when logging

Use DEBUG* macros for logging, instead of RDEBUG* macros in
radius_start_program and radius_readfrom_program as these are not
guaranteed to be invoked with a valid request.

For example, not from most of the exec_trigger invocations.
raddb: Remove extra apostrophe from trigger.conf

Remove a spurious apostrophe from trigger.conf's trigger.modules.args.

This fixes module triggers, otherwise producing this error:

    rad_expand_xlat: Invalid string passed as argument
raddb: Use appropriate module names in traps

Specify appropriate module names for all module traps in trigger.conf,
instead of using "ldap" for all.
doxygen
Gotta catch em all (SIGILL)
Fix OpenSSL version check issues
Decode status nibble