Use a fixed mpd password

src/freedombone-app-mpd

@@ -46,6 +46,7 @@ REQUIRES_APP=
 MPD_DOMAIN_NAME=
 MPD_PORT=6600
 MPD_PORT_HTTP=8250
+MPD_ADMIN_PASSWORD='mpd'
 
 # These parameters are used by the FreedomBox mobile app and web UI
 MPD_SHORT_DESCRIPTION="Stream music from your server"
@@ -116,14 +117,7 @@ function change_password_mpd {
     curr_username="$1"
     new_user_password="$2"
 
-    read_config_param MY_USERNAME
-
-    if [[ "$curr_username" == "$MY_USERNAME" ]]; then
-        sed -i "s|password.*|password                \"${new_user_password}@read,add,control,admin\"";
-        systemctl restart mpd
-    fi
-
-    "${PROJECT_NAME}-pass" -u "$curr_username" -a mpd -p "$new_user_password"
+    "${PROJECT_NAME}-pass" -u "$curr_username" -a mpd -p "$MPD_ADMIN_PASSWORD"
 }
 
 function reconfigure_mpd {
@@ -229,19 +223,6 @@ function install_mpd {
 
     increment_app_install_progress
 
-    if [ -f "$IMAGE_PASSWORD_FILE" ]; then
-        MPD_ADMIN_PASSWORD="$(printf "%s" "$(cat "$IMAGE_PASSWORD_FILE")")"
-    else
-        if [ ! "$MPD_ADMIN_PASSWORD" ]; then
-            MPD_ADMIN_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
-        fi
-    fi
-    if [ ! "$MPD_ADMIN_PASSWORD" ]; then
-        exit 92
-    fi
-
-    increment_app_install_progress
-
     "${PROJECT_NAME}-pass" -u "$MY_USERNAME" -a mpd -p "$MPD_ADMIN_PASSWORD"
 
     increment_app_install_progress