Update to syncthing 1.23.0

Builds and runs fine on amd64 with go-1.19.4p1.
tb reports problems with WIP go-1.20.0, but that will be dealt with later.

"go for it" tb
OK edd

net/syncthing/Makefile

@@ -1,11 +1,8 @@
 COMMENT =	open decentralized synchronization utility
 
-# Using a release candidate until there's a release that supports go-1.19.
-V =		1.21.0-rc.1
-PKGNAME =	syncthing-1.21.0rc1
+V =		1.23.0
 DISTNAME =	syncthing-${V}
 DISTFILES =	syncthing-source-v${V}${EXTRACT_SUFX}
-REVISION =	0
 
 CATEGORIES =	net
 HOMEPAGE =	https://syncthing.net/

net/syncthing/distinfo

@@ -1,2 +1,2 @@
-SHA256 (syncthing-source-v1.21.0-rc.1.tar.gz) = RmKjiV8KFCEl0dNu3LRaump/TaGG3P+KXAHPVGZX5fM=
-SIZE (syncthing-source-v1.21.0-rc.1.tar.gz) = 13884569
+SHA256 (syncthing-source-v1.23.0.tar.gz) = D2bT3Sp5FabzymdzwdwCNFREsmRKUzIRzh7lezca5Fg=
+SIZE (syncthing-source-v1.23.0.tar.gz) = 13936173

net/syncthing/patches/patch-build_go

@@ -1,7 +1,7 @@
 Index: build.go
 --- build.go.orig
 +++ build.go
-@@ -544,7 +544,7 @@ func appendParameters(args []string, tags []string, pk
+@@ -547,7 +547,7 @@ func appendParameters(args []string, tags []string, pk
  
  	if !debugBinary {
  		// Regular binaries get version tagged and skip some debug symbols