ctld: Some bool-related cleanups

[jhb]

Summary

• Convert a few variables from int to bool

• Return bool instead of inverted 0/1 from configuration parsing functions and the auth check functions

• Invert the existing dont_daemonize bool into a daemonize boolx

[asomers]

Thanks for doing all this cleanup.

usr.sbin/ctld/ctld.c

1274

Huh, the int-bool relationship was backwards for this function. Awkward.