Typo fixes (#2031)

plugin/proxy/README.md

@@ -99,7 +99,7 @@ If monitoring is enabled (via the *prometheus* directive) then the following met
 Where `proxy_proto` is the protocol used (`dns` or `grpc`) and `to` is **TO**
 specified in the config, `proto` is the protocol used by the incoming query ("tcp" or "udp"), family
 the transport family ("1" for IPv4, and "2" for IPv6). `Server` is the server responsible for the
-request (and metric). See the documention in the metrics plugin.
+request (and metric). See the documentation in the metrics plugin.
 
 ## Examples
 

plugin/proxy/proxy.go

@@ -123,7 +123,7 @@ func (p Proxy) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (
 				// Note this keeps looping and trying until tryDuration is hit, at which point our client
 				// might be long gone...
 				if oe.Timeout() {
-					// Our upstream's upstream is problably messing up, continue with next selected
+					// Our upstream's upstream is probably messing up, continue with next selected
 					// host - which my be the *same* one as we don't set any uh.Fails.
 					continue
 				}

plugin/proxy/upstream_test.go

@@ -269,7 +269,7 @@ junky resolv.conf
 
 		path, rm, err := test.TempFile(".", tc.filedata)
 		if err != nil {
-			t.Fatalf("Test %d could not creat temp file %v", i, err)
+			t.Fatalf("Test %d could not create temp file %v", i, err)
 		}
 		defer rm()