irc/soju: Import a patch from upstream

This is bug fix related to using it over VPN, or behind a reverse
proxy. See https://todo.sr.ht/~emersion/soju/134, and
https://github.com/emersion/soju/pull/33.

irc/soju/Makefile

@@ -1,6 +1,7 @@
 PORTNAME=	soju
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.2.0
+PORTREVISION=	1
 CATEGORIES=	irc
 MASTER_SITES=	https://git.sr.ht/~emersion/go-scfg/archive/:goscfg \
 		https://git.sr.ht/~sircmpwn/go-bare/archive/:gobare

irc/soju/files/patch-cmd_soju_main.go

@@ -0,0 +1,9 @@
+--- cmd/soju/main.go.orig	2021-09-13 12:23:33 UTC
++++ cmd/soju/main.go
+@@ -253,5 +253,6 @@ func proxyProtoListener(ln net.Listener, srv *soju.Ser
+ 			}
+ 			return proxyproto.IGNORE, nil
+ 		},
++		ReadHeaderTimeout: 5 * time.Second,
+ 	}
+ }