Logging - pg_options format change?

Would it be objectionable if I altered the format of the pg_options file slightly?
I feel the need to handle a somewhat more complex syntax for the logging subsystem.

What I'm proposing is to wrap the existing stuff in a backwards-compatible manner,
but extend it. Like so:

---------------------------------------------------
# postgresql options

debugging {fooparam+barswitchdumplevel = 11
}

logging {# details to follow
}
---------------------------------------------------

Also, is YACC sufficently thread-safe that if a SIGHUP starts
parsing options it won't collide with another task's in-progress
parsing of, say a SELECT statement?
  Thanks,
    Tim Holloway