only sync active mbsync accounts

bin/mailsync

@@ -38,7 +38,7 @@ syncandnotify() {
 
 # Sync accounts passed as argument or all.
 if [ "$#" -eq "0" ]; then
-    accounts="$(ls "$HOME/.local/share/mail")"
+    accounts="$(awk '/^Channel/ {print $2}' "$HOME/.mbsyncrc")"
 else
     accounts=$*
 fi