Better compatibility with perl sendxmpp config files.

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## UNRELEASED
 ### Changed
 - Properly handle lost connection.
+- Better compatibility with perl sendxmpp config files.
 
 ## [v0.8.3] 2024-02-17
 ### Changed

main.go

@@ -217,6 +217,12 @@ func main() {
 	if *flagPassword != "" {
 		password = *flagPassword
 	}
+	// If no server part is specified in the username but a server is specified
+	// just assume the server is identical to the server part and hope for the
+	// best. This is for compatibility with the old perl sendxmpp config files.
+	if !strings.Contains(user, "@") && server != "" {
+		user = user + "@" + server
+	}
 
 	switch {
 	// Use "go-sendxmpp" if no nick is specified via config or command line flag.