doc: document UNIX domain sockets in lightning-connect.

We document how to bind to them, just not how to connect to them.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1diff --git a/doc/lightning-connect.7 b/doc/lightning-connect.7
index f143563ca..53619c44f 100644

doc/lightning-connect.7

@@ -2,12 +2,12 @@
 .\"     Title: lightning-connect
 .\"    Author: [see the "AUTHOR" section]
 .\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
-.\"      Date: 02/11/2019
+.\"      Date: 03/12/2019
 .\"    Manual: \ \&
 .\"    Source: \ \&
 .\"  Language: English
 .\"
-.TH "LIGHTNING\-CONNECT" "7" "02/11/2019" "\ \&" "\ \&"
+.TH "LIGHTNING\-CONNECT" "7" "03/12/2019" "\ \&" "\ \&"
 .\" -----------------------------------------------------------------
 .\" * Define some portability stuff
 .\" -----------------------------------------------------------------
@@ -44,6 +44,8 @@ If not specified, the \fIport\fR defaults to 9375\&.
 .sp
 If \fIhost\fR is not specified, the connection will be attempted to an IP belonging to \fIid\fR obtained through gossip with other already connected peers\&.
 .sp
+If \fIhost\fR begins with a \fI/\fR it is interpreted as a local path, and the connection will be made to that local socket (see \fBbind\-addr\fR in lightningd\-config(5))\&.
+.sp
 Connecting to a node is just the first step in opening a channel with another node\&. Once the peer is connected a channel can be opened with lightning\-fundchannel(7)\&.
 .SH "RETURN VALUE"
 .sp

doc/lightning-connect.7.txt

@@ -29,6 +29,10 @@ connection will be attempted to an IP belonging to
 'id' obtained through gossip with other already
 connected peers.
 
+If 'host' begins with a '/' it is interpreted as a local path,
+and the connection will be made to that local socket (see *bind-addr*
+in lightningd-config(5)).
+
 Connecting to a node is just the first step in opening 
 a channel with another node.
 Once the peer is connected a channel can be opened with