docs: fix sphinx warnings

Fixes: #5919

AUTHORS

@@ -1,7 +1,7 @@
 E-mail addresses listed here are not intended for support, please see
 the `support section`_ instead.
 
-.. support section: https://borgbackup.readthedocs.io/en/stable/support.html
+.. _support section: https://borgbackup.readthedocs.io/en/stable/support.html
 
 Borg authors ("The Borg Collective")
 ------------------------------------

docs/global.rst.inc

@@ -23,7 +23,6 @@
 .. _msgpack: https://msgpack.org/
 .. _`msgpack-python`: https://pypi.python.org/pypi/msgpack-python/
 .. _llfuse: https://pypi.python.org/pypi/llfuse/
-.. _homebrew: http://brew.sh/
 .. _userspace filesystems: https://en.wikipedia.org/wiki/Filesystem_in_Userspace
 .. _Cython: http://cython.org/
 .. _virtualenv: https://pypi.python.org/pypi/virtualenv/

docs/man_intro.rst

@@ -1,3 +1,5 @@
+:orphan:
+
 ====
 borg
 ====