fixes #286 nng_pair0_open (and all others) need man page

fixes #279 consider restructuring man sections

This represents a rather significant rework, and major editing
effort, for the entire set of manual pages.

All of the pages now have a section number in their filename;
this assists in some other tooling, particularly ebook generation
as every link needs to be programmatically modified when combined
into an ebook.

Section 5 is introduced, and populated with pages for the main
types, and all options are now documented.

Numerous errors have been corrected, including rewriting certain
portions such as the header section of the surveyor protocol.

Much work has been done to facilitate index generation, although
certainly more work remains here.

Every internal link within these pages now resolves; there are no
more dead links.  (This is required to generate Kindle format books.)

1 files changed, 0 insertions, 60 deletions

diff --git a/docs/man/nng_aio_set_timeout.adoc b/docs/man/nng_aio_set_timeout.adoc
deleted file mode 100644
index ff1244d5..00000000
--- a/docs/man/nng_aio_set_timeout.adoc
+++ /dev/null
@@ -1,60 +0,0 @@
-= nng_aio_set_timeout(3)
-//
-// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
-// Copyright 2018 Capitar IT Group BV <info@capitar.com>
-//
-// This document is supplied under the terms of the MIT License, a
-// copy of which should be located in the distribution where this
-// file was obtained (LICENSE.txt).  A copy of the license may also be
-// found online at https://opensource.org/licenses/MIT.
-//
-
-== NAME
-
-nng_aio_set_timeout - set asynchronous I/O timeout
-
-== SYNOPSIS
-
-[source, c]
------------
-#include <nng/nng.h>
-
-typedef int nng_duration;
-void nng_aio_set_timeout(nng_aio *aio, nng_duration timeout);
------------
-
-== DESCRIPTION
-
-The `nng_aio_set_timeout()` function sets a _timeout_ for the asynchronous
-operation associated with _aio_.  This causes a timer to be started when the operation is actually
-started.  If the timer expires before the operation is completed, then it is
-aborted with an error of `NNG_ETIMEDOUT`.  The _timeout_ is specified as a
-relative number of milliseconds.
-
-If the timeout is `NNG_DURATION_INFINITE`, then no timeout is used.
-If the timeout is `NNG_DURATION_DEFAULT`, then a "default" or socket-specific
-timeout is used.  (This is frequently the same as `NNG_DURATION_INFINITE`.)
-
-TIP: As most operations involve some context switching, it is usually a good
-idea to allow at least a few tens of milliseconds before timing them out --
-a too small timeout might not allow the operation to properly begin before
-giving up!
-
-The value of _timeout_ set for the _aio_ is persistent, so that if the
-handle is reused for multiple operations, they will have the same relative
-timeout.
-
-== RETURN VALUES
-
-None.
-
-== ERRORS
-
-None.
-
-== SEE ALSO
-
-<<nng_aio_alloc#,nng_aio_alloc(3)>>,
-<<nng_aio_cancel#,nng_aio_cancel(3)>>,
-<<nng_aio_result#,nng_aio_result(3)>>,
-<<nng#,nng(7)>>