🐛 Set protocol to `imap` when using ProtonMail

Part 1 of 2 for "Log-on not successful" bug when using ProtonMail.

The curl login check defaults to `imaps` when `protocol` isn't set.
Because ProtonMail isn't using any TLS, we have to use the `imap`
protocol.
The `protocol` variable was never set, so now we set it when the
ProtonMail flag (-p) is set.

Bug mentioned in:
Fixes:
- https://github.com/LukeSmithxyz/mutt-wizard/issues/608
- https://github.com/LukeSmithxyz/mutt-wizard/issues/622

bin/mw

@@ -351,6 +351,7 @@ while getopts "fplhodTYD:y:i:I:s:S:u:a:n:x:m:t:" o; do case "${o}" in
 	t) setact toggle || exit 1 ; cronmin="$OPTARG" ;;
 	T) setact toggle || exit 1 ;;
 	p) echo "NOTE: Protonmail users must install and configure Protonmail Bridge first for the first sync to work."
+		protocol="imap"
 		imap="127.0.0.1"
 		iport="1143"
 		smtp="127.0.0.1"