give individual notifications only if < 5

in accordance with #694

bin/mailsync

@@ -59,15 +59,16 @@ syncandnotify() {
     if [ -z "$opts" ]; then mbsync "$acc"; else mbsync "$opts" "$acc"; fi
     new=$(find "$HOME/.local/share/mail/$acc/INBOX/new/" "$HOME/.local/share/mail/$acc/Inbox/new/" "$HOME/.local/share/mail/$acc/inbox/new/" -type f -newer "${XDG_CONFIG_HOME:-$HOME/.config}/mutt/.mailsynclastrun" 2> /dev/null)
     newcount=$(echo "$new" | sed '/^\s*$/d' | wc -l)
-    if [ "$newcount" -gt "0" ]; then
-	notify "$acc" "$newcount" &
-        for file in $new; do
-            # Extract subject and sender from mail.
-            from=$(awk '/^From: / && ++n ==1,/^\<.*\>:/' "$file" | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | awk '{ $1=""; if (NF>=3)$NF=""; print $0 }' | sed 's/^[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//')
-            subject=$(awk '/^Subject: / && ++n == 1,/^\<.*\>: / && ++i == 2' "$file" | head -n 1 | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | sed 's/^Subject: //' | sed 's/^{[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//' | tr -d '\n')
-	    messageinfo &
-        done
-    fi
+    case 1 in
+	$((newcount > 5)) ) notify "$acc" "$newcount" ;;
+    	$((newcount > 0)) ) notify "$acc" "$newcount"
+		for file in $new; do
+		    # Extract subject and sender from mail.
+		    from=$(awk '/^From: / && ++n ==1,/^\<.*\>:/' "$file" | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | awk '{ $1=""; if (NF>=3)$NF=""; print $0 }' | sed 's/^[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//')
+		    subject=$(awk '/^Subject: / && ++n == 1,/^\<.*\>: / && ++i == 2' "$file" | head -n 1 | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | sed 's/^Subject: //' | sed 's/^{[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//' | tr -d '\n')
+		    messageinfo &
+		done ;;
+    esac
 }
 
 # Sync accounts passed as argument or all.