Allow the password to start with a -.

In that case the options have to be terminated with a --.
In future this options should be added to all functions.

@@ -141,9 +141,10 @@ function amngrid() {
 
 function amngrcrypt() {
 	local OPT OPTARG OPTIND PLAIN RECIPIENT
+	local OPTEND=0
 	local USAGE="$(printf "Usage: %s [-h] [-r recipient] password" "$0")"
 
-	while getopts hr: OPT
+	while getopts hr:- OPT
 	do
 		case $OPT in
 			r)
@@ -151,10 +152,13 @@ function amngrcrypt() {
 			h)
 				echo "${USAGE}"
 				return 0;;
+			-)
+				OPTEND=1;;
 			?)
 				echo "${USAGE}"
 				return 1;;
 		esac
+		test ${OPTEND} -eq 1 && break
 	done
 	shift $(($OPTIND-1))
 
@@ -201,13 +205,14 @@ function amngrgen() {
 
 function amngradd() {
 	local OPT OPTARG OPTIND DESCRIPTION RECIPIENT DB
+	local OPTEND=0
 	local USAGE="$(cat <<-EOT
 		Usage: $0 [-h] [-d description] [-D dbfile] [-r recipient]
 		       account [username [password]]
 	EOT
 	)"
 
-	while getopts d:D:hr: OPT
+	while getopts d:D:hr:- OPT
 	do
 		case $OPT in
 			d)
@@ -219,10 +224,13 @@ function amngradd() {
 			h)
 				echo "${USAGE}"
 				return 0;;
+			-)
+				OPTEND=1;;
 			?)
 				echo "${USAGE}"
 				return 1;;
 		esac
+		test ${OPTEND} -eq 1 && break
 	done
 	shift $(($OPTIND-1))
 
@@ -255,7 +263,7 @@ function amngradd() {
 
 	if [ "${3}" ]
 	then
-		PASSWORD="$(amngrcrypt -r "${RECIPIENT}" "${3}")"
+		PASSWORD="$(amngrcrypt -r "${RECIPIENT}" -- "${3}")"
 	else
 		PASSWORD="$(amngrgen -r "${RECIPIENT}")"
 		echo -n "${PASSWORD}" | gpg -dq | xclip -i