move adsb.lol station map check out of interpret_ultrafeeder_config (#159)

this script is sourced by multiple scripts and we only need to do show
the station map URL once

also curl has long maximum timeouts which can block important services
from starting up if there is an issue with adsb.lol or the network / DNS

rootfs/etc/s6-overlay/s6-rc.d/aggregator-urls/run

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec /etc/s6-overlay/scripts/aggregator-urls

rootfs/etc/s6-overlay/s6-rc.d/aggregator-urls/type

@@ -0,0 +1 @@
+longrun

rootfs/etc/s6-overlay/scripts/aggregator-urls

@@ -0,0 +1,34 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash disable=SC2015,SC2016,SC1091
+
+#---------------------------------------------------------------------------------------------
+# Copyright (C) 2023-2024, Ramon F. Kolb (kx1t) and contributors
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with this program.
+# If not, see <https://www.gnu.org/licenses/>.
+#---------------------------------------------------------------------------------------------
+
+source /scripts/common
+source /scripts/interpret_ultrafeeder_config
+
+# wait 30 seconds for connections to be established
+sleep 30
+
+if [[ "${READSB_CONF_ARR[*]}" =~ "in.adsb.lol" ]]; then
+    myadsblol="$(curl -sLD - https://my.adsb.lol -o /dev/null -w '%{url_effective}' 2>&1 | sed '/location: /h;g;$!d;s/^.* \(.*\)$/\1/')"
+    if [[ -n "$myadsblol" ]] && [[ ! $myadsblol =~ sorry-but-i-could-not-find-your-receiver ]]; then
+        "${s6wrap[@]}" echo "ADSB.LOL station map available at $myadsblol"
+    fi
+fi
+
+# one shots have weird behaviour, just use longrun and stop the service once this is done
+stop_service

rootfs/scripts/interpret_ultrafeeder_config

@@ -97,14 +97,6 @@ do
             done
             # Now add $readsb_str to the READSB_CONF_ARR() as --net-connector argument:
             READSB_CONF_ARR+=("--net-connector=${readsb_str}")
-
-            if [[ ${param[1],,} == "in.adsb.lol" ]]; then
-                myadsblol="$(curl -sLD - https://my.adsb.lol -o /dev/null -w '%{url_effective}' 2>&1 | sed '/location: /h;g;$!d;s/^.* \(.*\)$/\1/')"
-                if [[ -n "$myadsblol" ]] && [[ ! $myadsblol =~ sorry-but-i-could-not-find-your-receiver ]]; then
-                    "${s6wrap[@]}" echo "ADSB.LOL station map available at $myadsblol"
-                fi
-            fi
-
         ;;
 
         mlat)