Switch to Quad114 as the default resolver

Quad9 current returns SERVFAIL for dnscrypt.info and there have
been reports of it not working as expected in some countries as well.

dnscrypt-proxy/example-dnscrypt-proxy.toml

@@ -110,7 +110,7 @@ cert_refresh_delay = 240
 ## It will not be used if the configured system DNS works.
 ## A resolver supporting DNSSEC is recommended. This may become mandatory.
 
-fallback_resolver = '9.9.9.9:53'
+fallback_resolver = '114.114.114.114:53'
 
 
 ## Never try to use the system DNS settings; unconditionally use the

dnscrypt-proxy/xtransport.go

@@ -19,7 +19,7 @@ import (
 	"github.com/miekg/dns"
 )
 
-const DefaultFallbackResolver = "9.9.9.9:53"
+const DefaultFallbackResolver = "114.114.114.114:53"
 
 type CachedIPs struct {
 	sync.RWMutex