dist: Update vim syntax file to include new keywords

dist/vim/syntax/maddy-conf.vim

@@ -39,9 +39,11 @@ hi def link maddyFloat		Float
 
 " grep --no-file -E 'Register.*\(".+", ' **.go | sed -E 's/.+Register.*\("([^"]+)", .+/\1/' | sort -u
 syn keyword maddyModule
+	\ apply_spf
 	\ dummy
 	\ extauth
 	\ imap
+	\ lmtp
 	\ pam
 	\ queue
 	\ remote
@@ -51,7 +53,9 @@ syn keyword maddyModule
 	\ require_matching_rdns
 	\ require_mx_record
 	\ shadow
+	\ sign_dkim
 	\ smtp
+	\ smtp_downstream
 	\ sql
 	\ submission
 	\ test_check
@@ -70,41 +74,59 @@ syn keyword maddyDispatchDir
 
 " grep --no-file -E 'cfg..+\(".+", ' **.go | sed -E 's/.+cfg..+\("([^"]+)", .+/\1/' | sort -u
 syn keyword maddyModDir
+	\ allow_body_subset
+	\ allow_multiple_from
 	\ appendlimit
+	\ attempt_starttls
 	\ auth
 	\ auth_domains
+	\ authenticate_mx
 	\ auth_perdomain
 	\ autogenerated_msg_domain
+	\ body_canon
 	\ bounce
 	\ broken_sig_action
+	\ compression
 	\ debug
 	\ defer_sender_reject
+	\ domain
 	\ driver
 	\ dsn
 	\ fail_action
 	\ fsstore
+	\ hash
+	\ header_canon
 	\ helper
 	\ hostname
 	\ insecure_auth
 	\ io_debug
 	\ junk_mailbox
+	\ key_path
 	\ location
 	\ max_message_size
 	\ max_parallelism
 	\ max_recipients
 	\ max_tries
 	\ mtasts_cache
+	\ newkey_algo
 	\ no_sig_action
+	\ oversign_fields
 	\ read_timeout
+	\ required_fields
+	\ require_sender_match
 	\ require_tls
+	\ selector
+	\ sig_expiry
+	\ sign_fields
 	\ sqlite3_busy_timeout
 	\ sqlite3_cache_size
 	\ sqlite3_exclusive_lock
 	\ storage
 	\ storage_perdomain
-	\ submission
 	\ target
+	\ targets
 	\ tls
+	\ tls_client
 	\ use_helper
 	\ write_timeout