Fixed breakage caused by splitting on SPACE in OPENVPN_CONFIG

Changed to split on comma as many openvpn configs have space in the name.

Added a bit more validation that a provider is set.

Updated docs.

README.md

@@ -65,10 +65,10 @@ Find available OpenVPN configurations by looking in the openvpn folder of the Gi
 -e "OPENVPN_CONFIG=ipvanish-AT-Vienna-vie-c02"
 ```
 
-You can also provide a list of openvpn configuration filenames separated by a space.  
+You can also provide a comma separated list of openvpn configuration filenames.
 If you provide a list, a file will be randomly chosen in the list, this is useful for redundancy setups. For example:
 ```
--e "OPENVPN_CONFIG=ipvanish-AT-Vienna-vie-c02 ipvanish-FR-Paris-par-a01 ipvanish-DE-Frankfurt-fra-a01"
+-e "OPENVPN_CONFIG=ipvanish-AT-Vienna-vie-c02,ipvanish-FR-Paris-par-a01,ipvanish-DE-Frankfurt-fra-a01"
 ```
 If you provide a list and the selected server goes down, after the value of ping-timeout the container will be restarted and a server will be randomly chosen, note that the faulty server can be chosen again, if this should occur, the container will be restarted again until a working server is selected.  
 

openvpn/start.sh

@@ -1,7 +1,11 @@
 #!/bin/bash
 VPN_PROVIDER="${OPENVPN_PROVIDER,,}"
 VPN_PROVIDER_CONFIGS="/etc/openvpn/${VPN_PROVIDER}"
-if [[ ! -d "${VPN_PROVIDER_CONFIGS}" ]]; then
+
+if [[ "${OPENVPN_PROVIDER}" == "**None**" ]] || [[ -z "${OPENVPN_PROVIDER-}" ]]; then
+  echo "OpenVPN provider not set. Exiting."
+  exit 1
+elif [[ ! -d "${VPN_PROVIDER_CONFIGS}" ]]; then
   echo "Could not find OpenVPN provider: ${OPENVPN_PROVIDER}"
   echo "Please check your settings."
   exit 1
@@ -9,14 +13,12 @@ fi
 
 echo "Using OpenVPN provider: ${OPENVPN_PROVIDER}"
 
-if [[ ! -z "${OPENVPN_CONFIG}" ]]; then
-  n=$(echo "$OPENVPN_CONFIG" | wc -w)
-  if [ $n -gt 1 ]
-  then
-    rnd=$((RANDOM%n+1))
-    srv=$(echo "$OPENVPN_CONFIG" | awk -vrnd=$rnd '{print $rnd}')
-    echo "$n servers found in OPENVPN_CONFIG, $srv chosen randomly"
-    OPENVPN_CONFIG=$srv
+if [[ -n "${OPENVPN_CONFIG-}" ]]; then
+  readarray -t OPENVPN_CONFIG_ARRAY <<< "${OPENVPN_CONFIG//,/$'\n'}"
+  if (( ${#OPENVPN_CONFIG_ARRAY[@]} > 1 )); then
+    OPENVPN_CONFIG_RANDOM=$((RANDOM%${#OPENVPN_CONFIG_ARRAY[@]}))
+    echo "${#OPENVPN_CONFIG_ARRAY[@]} servers found in OPENVPN_CONFIG, ${OPENVPN_CONFIG_ARRAY[${OPENVPN_CONFIG_RANDOM}]} chosen randomly"
+    OPENVPN_CONFIG="${OPENVPN_CONFIG_ARRAY[${OPENVPN_CONFIG_RANDOM}]}"
   fi
 
   if [[ -f "${VPN_PROVIDER_CONFIGS}/${OPENVPN_CONFIG}".ovpn ]]; then