internal/home: Add a status page on home

internal/config/domains.go

@@ -42,18 +42,26 @@ func (cfg Config) DefaultSSLHost() string {
 	return cfg.IfHttps(cfg.DefaultHost())
 }
 
-// SlugFromHost returns the slug belonging to the appropriate host.
-func (cfg Config) SlugFromHost(host string) (slug string) {
+// SlugFromHost returns the slug belonging to the appropriate host.'
+//
+// When host is a top-level domain, returns "", true.
+// When no slug is found, returns "", false.
+func (cfg Config) SlugFromHost(host string) (slug string, ok bool) {
 	// extract an ':port' that happens to be in the host.
 	domain, _, _ := strings.Cut(host, ":")
+	domainL := strings.ToLower(domain)
 
 	// check all the possible domain endings
 	for _, suffix := range append([]string{cfg.DefaultDomain}, cfg.SelfExtraDomains...) {
-		if strings.HasSuffix(domain, "."+suffix) {
-			return domain[:len(domain)-len(suffix)-1]
+		suffixL := strings.ToLower(suffix)
+		if domainL == suffixL {
+			return "", true
+		}
+		if strings.HasSuffix(domainL, "."+suffixL) {
+			return domain[:len(domain)-len(suffix)-1], true
 		}
 	}
 
 	// no domain found!
-	return ""
+	return "", ok
 }