add .gmi type and update README

README.md

@@ -2,12 +2,9 @@
 
 Castor is a lightweight but full-featured gemini server, focused on ease of setup and use.
 
-It uses caddy's certmagic library to generate valid TLS certificates automatically on port 80, then reuses them on port 1965 for gemini connections. Alternatively, administators can supply their own certificates.
-
 Servers are configured using `Castorfile`s, analogous to Caddyfiles or nginx configurations. Various handlers can be defined:
 
 - static file serving
-- proxying to other applications
 - hard-coded responses
 
 Castorfiles also support client cert requirements; lists of client certificate hashes can be provided for authentication, or simply as session-management (hashes being passed off to a backend server for mapping to a user identity).

main.go

@@ -219,7 +219,8 @@ func main() {
 	log := NewLogger(true)
 
 	err := mime.AddExtensionType(".gemini", "text/gemini")
-	if err != nil {
+	err2 := mime.AddExtensionType(".gmi", "text/gemini")
+	if err != nil || err2 != nil {
 		log.Info("Could not add text/gemini to mime-type database;", err)
 	}