Add --list-hosts to man pages.

Fixes #9574

docs/man/man1/ansible-playbook.1

@@ -147,6 +147,11 @@ is mostly useful for crontab or kickstarts\&.
 .RS 4
 Further limits the selected host/group patterns\&.
 .RE
+.PP
+\fB\-\-list\-hosts\fR
+.RS 4
+Outputs a list of matching hosts; does not execute anything else\&.
+.RE
 .SH "ENVIRONMENT"
 .sp
 The following environment variables may be specified\&.

docs/man/man1/ansible-playbook.1.asciidoc.in

@@ -124,6 +124,9 @@ and 'local'.  'local' is mostly useful for crontab or kickstarts.
 
 Further limits the selected host/group patterns.
 
+*--list-hosts*::
+
+Outputs a list of matching hosts; does not execute anything else.
 
 ENVIRONMENT
 -----------

docs/man/man1/ansible.1

@@ -180,6 +180,11 @@ Further limits the selected host/group patterns\&.
 .RS 4
 Further limits hosts with a regex pattern\&.
 .RE
+.PP
+\fB\-\-list\-hosts\fR
+.RS 4
+Outputs a list of matching hosts; does not execute anything else\&.
+.RE
 .SH "INVENTORY"
 .sp
 Ansible stores the hosts it can potentially operate on in an inventory file\&. The syntax is one host per line\&. Groups headers are allowed and are included on their own line, enclosed in square brackets that start the line\&.

docs/man/man1/ansible.1.asciidoc.in

@@ -122,6 +122,10 @@ Further limits the selected host/group patterns.
 
 Further limits hosts with a regex pattern.
 
+*--list-hosts*::
+
+Outputs a list of matching hosts; does not execute anything else.
+
 INVENTORY
 ---------