15-local-resolvers: strip trailing whitespace

Trailing whitespaces break configs that use quotation marks around vars.
See https://github.com/nginxinc/docker-nginx-unprivileged/issues/234

entrypoint/15-local-resolvers.envsh

@@ -9,4 +9,7 @@ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 [ "${NGINX_ENTRYPOINT_LOCAL_RESOLVERS:-}" ] || return 0
 
 NGINX_LOCAL_RESOLVERS=$(awk 'BEGIN{ORS=" "} $1=="nameserver" {if ($2 ~ ":") {print "["$2"]"} else {print $2}}' /etc/resolv.conf)
+
+NGINX_LOCAL_RESOLVERS="${NGINX_LOCAL_RESOLVERS% }"
+
 export NGINX_LOCAL_RESOLVERS

mainline/alpine-slim/15-local-resolvers.envsh

@@ -9,4 +9,7 @@ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 [ "${NGINX_ENTRYPOINT_LOCAL_RESOLVERS:-}" ] || return 0
 
 NGINX_LOCAL_RESOLVERS=$(awk 'BEGIN{ORS=" "} $1=="nameserver" {if ($2 ~ ":") {print "["$2"]"} else {print $2}}' /etc/resolv.conf)
+
+NGINX_LOCAL_RESOLVERS="${NGINX_LOCAL_RESOLVERS% }"
+
 export NGINX_LOCAL_RESOLVERS

mainline/debian/15-local-resolvers.envsh

@@ -9,4 +9,7 @@ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 [ "${NGINX_ENTRYPOINT_LOCAL_RESOLVERS:-}" ] || return 0
 
 NGINX_LOCAL_RESOLVERS=$(awk 'BEGIN{ORS=" "} $1=="nameserver" {if ($2 ~ ":") {print "["$2"]"} else {print $2}}' /etc/resolv.conf)
+
+NGINX_LOCAL_RESOLVERS="${NGINX_LOCAL_RESOLVERS% }"
+
 export NGINX_LOCAL_RESOLVERS

stable/alpine-slim/15-local-resolvers.envsh

@@ -9,4 +9,7 @@ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 [ "${NGINX_ENTRYPOINT_LOCAL_RESOLVERS:-}" ] || return 0
 
 NGINX_LOCAL_RESOLVERS=$(awk 'BEGIN{ORS=" "} $1=="nameserver" {if ($2 ~ ":") {print "["$2"]"} else {print $2}}' /etc/resolv.conf)
+
+NGINX_LOCAL_RESOLVERS="${NGINX_LOCAL_RESOLVERS% }"
+
 export NGINX_LOCAL_RESOLVERS

stable/debian/15-local-resolvers.envsh

@@ -9,4 +9,7 @@ PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 [ "${NGINX_ENTRYPOINT_LOCAL_RESOLVERS:-}" ] || return 0
 
 NGINX_LOCAL_RESOLVERS=$(awk 'BEGIN{ORS=" "} $1=="nameserver" {if ($2 ~ ":") {print "["$2"]"} else {print $2}}' /etc/resolv.conf)
+
+NGINX_LOCAL_RESOLVERS="${NGINX_LOCAL_RESOLVERS% }"
+
 export NGINX_LOCAL_RESOLVERS