No need for trailing `.' in commit message titles

Will fix in the next patch, sorry!

Personally, I'd hoist the #ifdef part into a standalone function
since I find mixing CPP and C conditionals confusing.

disclaimer: I'm an easily confused person and don't usually
program in C, though.

I considered extracting it out, but the other conditionals in this 
function follow a similar pattern so I didn't want to change it. 
However, my use here is also the first time there's both an #ifdef and 
nested #ifndef, which I agree makes it a bit confusing to grok.

I'm open to changing it, but I'll let it sit and marinate for a bit.

`nc' isn't widely installed, its supported flags vary between
implementations, and our test suite doesn't currently use it.
I suggest either using a small bit of Perl or writing a t/helper
program to do its job.

Finally, hard tabs should be used for indentation throughout.

I'll wait on others to comment since I haven't looked at git
hacking in a while.

Anyways, I think this feature could be useful for me, too :>
Thanks.

Good catch, I'll fix in the next patch. I've subbed `nc` out for a 
simple Perl script to pipe back and forth, just making sure CI is happy 
about this before submitting.