The DNS_blocking class supports the same API as the DNS class, but
does not use events, so any method will complete before returning.
As such, the callback argument is optional.

js_callback_t was not being properly retreived.

Not having that dependency is the entire point of it.

Sheesh.

SRV, NAPTR, and URI

Thus appears to have been the root cause of the infinite loop/memory
issue.  Basically, line was never replaced if it didn't match
^{[0-9]+}$ and didn't result in a number when passed to parseInt()
This resulted in an infinite loop that kept pushing zero-length
strings into an array.

Implicated in possible infinite loop/OOM problems.

Fix for #247: Slyvote javascript error pMsgGrps[pGrpIdx] is undefined

See merge request !122

The command prompt is now always on the bottom of the screen

See merge request !121

a sub-board that has polls disabled.  This fixes an issue where SlyVote was showing all
available message groups but some could be empty due to having no sub-boards that allow polls.

(console.screen_rows).

Implement support for callback style programming

See merge request !118

This appears to work and the event handler *should* work on other
event types already.

Note, this is *nix-only due to the use of poll().  select() will
need to be used for Windows to keep XP compatability.

ignore .vscode

See merge request !119

Broken with the poll() update

If true, and if this is our first input, and if the users types
something that would otherwise have been appended to the default
text, then the default text is deleted first.

o from help screen no longer causes go-for to shit its pants in
dramatic fashion.
s and w are now aliases for tab and ` respectively (item nav).

Another Coverity-issued-fixed-introduced-bug.

Failure to remove a non-existant file is not reason for failure.

Basically, assume left is correct, and calculate the correct width
to fill the screen to the esge.

ARE YOU HAPPY NOW CYAN?!?!

Fixes *nix builds of Win32 programs.

Looks like I was partially restoring old code before I stopped.

Rather than depending on _WIN32 which is silly, make it clear what
exactly is being done and why.

Note that the spy socket stuff and some external stuff on *nix have
had the select() implementation removed.  To support using select()
on !Win32 will require de-refactoring that's not really worth doing.
Instead, just use #error and reference the commit where the old
code can be found.

Rather than defaulting to zero lines high and the width of the title,
default to the entire screen area.

Poll update

See merge request !116

Still needs updates in services_thread(), CGI stuff in websrvr.c,
and sbbs_t::external()

Found by digging through headers... Apple doesn't document this.

Just some more macOS silliness.