Just found out herestrings aren't POSIX. Removed.

http_check_telegram

@@ -46,7 +46,7 @@ send_message() {
 }
 
 get_http_code() {
-    if host $(awk '{gsub("https?://|/.*","")}1' <<< $1) &>/dev/null; then
+    if host $(printf '%s\n' $1 | awk '{gsub("https?://|/.*","")}1') &>/dev/null; then
         curl -sILk --max-time $TIME $1 | grep HTTP | tail -n 1 | grep -Eo '[0-9]{3}' || printf '%s\n' 999
     else
         printf '%s\n' 000