man pages: document the --subid installer option

Document --subid in the man pages for
- ipa-client-install
- ipa-replica-install
- ipa-server-install

Related: https://pagure.io/freeipa/issue/9159
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

client/man/ipa-client-install.1

@@ -136,6 +136,9 @@ Do not configure OpenSSH server.
 \fB\-\-no\-sudo\fR
 Do not configure SSSD as a data source for sudo.
 .TP
+\fB\-\-subid\fR
+Configure SSSD as data source for subid.
+.TP
 \fB\-\-no\-dns\-sshfp\fR
 Do not automatically create DNS SSHFP records.
 .TP

install/tools/man/ipa-replica-install.1

@@ -92,6 +92,9 @@ Do not configure OpenSSH client.
 \fB\-\-no\-sshd\fR
 Do not configure OpenSSH server.
 .TP
+\fB\-\-subid\fR
+Configure SSSD as data source for subid.
+.TP
 \fB\-\-skip\-conncheck\fR
 Skip connection check to remote master
 .TP

install/tools/man/ipa-server-install.1

@@ -80,6 +80,9 @@ Do not configure OpenSSH client.
 \fB\-\-no\-sshd\fR
 Do not configure OpenSSH server.
 .TP
+\fB\-\-subid\fR
+Configure SSSD as data source for subid.
+.TP
 \fB\-d\fR, \fB\-\-debug\fR
 Enable debug logging when more verbose output is needed.
 .TP