luci-app-dnscrypt-proxy: major update

* automatically transfer dnscrypt specific settings to dnsmasq as well,
  This may change the values for 'noresolv', 'resolvfile',
  'allservers' and the list 'server' settings (enabled by default)
* parse/show the resolver, Location, DNSSEC- and NOLOG-Flag
  in the resolver select box
* make buttons for resolver list download & file creation
  (resolv-crypt.conf) more descriptive & responsive
* ease the startup trigger handling
* add an edit tab for 'resolv-crypt.conf' in the 'Advanced' section

Signed-off-by: Dirk Brenken <dev@brenken.org>