Add message handling man pages.

Note that we're also no longer overriding the source formatter or
the icons for new pages, since we can supply that on the command
line in the script that generates output.

1 files changed, 54 insertions, 0 deletions

diff --git a/docs/nng_msg_dup.adoc b/docs/nng_msg_dup.adoc
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+= nng_msg_dup(3)
+:doctype: manpage
+:manmanual: nng
+:mansource: nng
+:manvolnum: 3
+:copyright: Copyright 2018 Staysail Systems, Inc. <info@staysail.tech> \
+            Copyright 2018 Capitar IT Group BV <info@capitar.com> \
+            This software 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_msg_dup - duplicate a message
+
+== SYNOPSIS
+
+[source, c]
+-----------
+#include <nng/nng.h>
+
+int nng_msg_dup(nng_msg **dup, nng_msg_t *orig);
+-----------
+
+== DESCRIPTION
+
+The `nng_msg_dup()` makes a duplicate of the original message _orig_, and
+saves the result in the location pointed by _dup_.  The actual message
+body and header content is copied, but the duplicate may contain a
+different amount of unused space than the original message.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+`NNG_ENOMEM`:: Insufficient free memory exists to duplicate a message.
+
+== SEE ALSO
+
+<<nng_msg_alloc#,nng_msg_alloc(3)>>,
+<<nng_msg_free#,nng_msg_free(3)>>,
+<<nng_strerror#,nng_strerror(3)>>,
+<<nng#,nng(7)>>
+
+== COPYRIGHT
+
+Copyright 2018 mailto:info@staysail.tech[Staysail Systems, Inc.] +
+Copyright 2018 mailto:info@capitar.com[Capitar IT Group BV]
+
+This document is supplied under the terms of the
+https://opensource.org/licenses/MIT[MIT License].