core: Support Windows absolute paths for UDS proxy upstreams (#5114)

* added some tests for parseUpstreamDialAddress

Test 4 fails because it produces "[[::1]]:80" instead of "[::1]:80"

* support absolute windows path in unix reverse proxy address

* make IsUnixNetwork public, support +h2c and reuse it
* add new tests

1 files changed, 2 insertions, 2 deletions

diff --git a/listen_unix.go b/listen_unix.go
index dc955d8..7ea6745 100644
--- a/listen_unix.go
+++ b/listen_unix.go
@@ -34,7 +34,7 @@ import (
 // reuseUnixSocket copies and reuses the unix domain socket (UDS) if we already
 // have it open; if not, unlink it so we can have it. No-op if not a unix network.
 func reuseUnixSocket(network, addr string) (any, error) {
-	if !isUnixNetwork(network) {
+	if !IsUnixNetwork(network) {
 		return nil, nil
 	}
 
@@ -103,7 +103,7 @@ func listenTCPOrUnix(ctx context.Context, lnKey string, network, address string,
 
 // reusePort sets SO_REUSEPORT. Ineffective for unix sockets.
 func reusePort(network, address string, conn syscall.RawConn) error {
-	if isUnixNetwork(network) {
+	if IsUnixNetwork(network) {
 		return nil
 	}
 	return conn.Control(func(descriptor uintptr) {