Add preliminary support for static DNS settings.

DNSCrypt-Preference-Pane/DNSCrypt/extra/usr/scripts/common.inc

@@ -17,6 +17,7 @@ FALLBACK_FILE="${CONTROL_DIR}/fallback"
 HANDLERS_LOCK_FILE="/var/run/dnscrypt-handlers.lock"
 DOMAINS_EXCEPTIONS_FILE="${CONTROL_DIR}/domains-exceptions"
 DNSCRYPT_PROXY_PLUGINS_FILE="${CONTROL_DIR}/plugins"
+STATIC_RESOLVERS_FILE="${CONTROL_DIR}/static-resolvers"
 
 INTERFACE_UNBOUND="127.0.0.53"
 INTERFACE_UNBOUND_MASK="24"

DNSCrypt-Preference-Pane/DNSCrypt/extra/usr/scripts/set-dns-to-dhcp.sh

@@ -4,12 +4,22 @@
 
 servers='empty'
 
+if [ -r "$STATIC_RESOLVERS_FILE" ]; then
+  servers=''
+  while read server; do
+    case "$server" in
+      [0-9a-fA-F:.]*) servers="${servers} ${server}" ;;
+    esac
+  done < "$STATIC_RESOLVERS_FILE"
+  [ -z "$servers" ] && servers='empty'
+fi
+
 [ -e "$INSECURE_OPENDNS_FILE" ] && servers='208.67.220.220'
 [ -e "$FAMILYSHIELD_FILE" ] && servers='208.67.220.123'
 
 exec networksetup -listallnetworkservices 2>/dev/null | \
 fgrep -v '*' | while read x ; do
-  networksetup -setdnsservers "$x" "$servers"
+  networksetup -setdnsservers "$x" $servers
 done
 dscacheutil -flushcache 2> /dev/null
 killall -HUP mDNSResponder 2> /dev/null