Improve kdig man: show the default for options

I was just reading the kdig man page, and looking at the various [no]option options, and realised that it's not obvious what the default for each option is. For example, multiline defaults to off (nomultiline), but crypto defaults to on. Therefore, reading the man page for kdig will not help a user to understand the behaviour of kdig. It will only become apparent when the user runs kdig and sees what the output looks like.

It would be great if future versions of the kdig man page made this clear for every option. Here's one suggestion:

The following options can be enabled by the absence of "no" or disabled the presence of the "no"
prefix. The defaults are indicated by the presence or absence of "no" in the description of each
option:
 
+nomultiline  Wrap long records to more lines and improve human readability.

+crypto       Display the DNSSEC keys and signatures values in base64, instead of omitting them.

+nonsid       Request the nameserver identifier (NSID).

In this example, we can see that multiline and nsid default to off, because they are described by having "no", whereas crypto defaults to on.