fix spelling mistakes (#3364)

Automatically submitted.

coredns.1.md

 ## CoreDNS
 
-*coredns* - plugable DNS nameserver optimized for service discovery and flexibility.
+*coredns* - pluggable DNS nameserver optimized for service discovery and flexibility.
 
 ## Synopsis
 

plugin/acl/README.md

@@ -4,7 +4,7 @@
 
 ## Description
 
-With `acl` enabled, users are able to block suspicous DNS queries by configuring IP filter rule sets, i.e. allowing authorized queries to recurse or blocking unauthorized queries.
+With `acl` enabled, users are able to block suspicious DNS queries by configuring IP filter rule sets, i.e. allowing authorized queries to recurse or blocking unauthorized queries.
 
 This plugin can be used multiple times per Server Block.
 

plugin/acl/acl.go

@@ -81,7 +81,7 @@ RulesCheckLoop:
 }
 
 // matchWithPolicies matches the DNS query with a list of ACL polices and returns suitable
-// action agains the query.
+// action against the query.
 func matchWithPolicies(policies []policy, w dns.ResponseWriter, r *dns.Msg) action {
 	state := request.Request{W: w, Req: r}
 

plugin/forward/persistent.go

@@ -118,14 +118,14 @@ func (t *Transport) cleanup(all bool) {
 	}
 }
 
-// It is hard to pin a value to this, the import thing is to no block forever, loosing at cached connection is not terrible.
+// It is hard to pin a value to this, the import thing is to no block forever, losing at cached connection is not terrible.
 const yieldTimeout = 25 * time.Millisecond
 
 // Yield return the connection to transport for reuse.
 func (t *Transport) Yield(pc *persistConn) {
 	pc.used = time.Now() // update used time
 
-	// Make ths non-blocking, because in the case of a very busy forwarder we will *block* on this yield. This
+	// Make this non-blocking, because in the case of a very busy forwarder we will *block* on this yield. This
 	// blocks the outer go-routine and stuff will just pile up.  We timeout when the send fails to as returning
 	// these connection is an optimization anyway.
 	select {

plugin/route53/route53.go

@@ -193,7 +193,7 @@ func maybeUnescape(s string) (string, error) {
 		case r >= rune('0') && r <= rune('9'):
 		case r == rune('*'):
 			if out != "" {
-				return "", errors.New("`*' ony supported as wildcard (leftmost label)")
+				return "", errors.New("`*' only supported as wildcard (leftmost label)")
 			}
 		case r == rune('-'):
 		case r == rune('.'):

plugin/route53/route53_test.go

@@ -285,7 +285,7 @@ func TestMaybeUnescape(t *testing.T) {
 		// 3. Escaped dot, 'a' and a hyphen. No idea why but we'll allow it.
 		{escaped: `weird\\055ex\\141mple\\056com\\056\\056`, want: "weird-example.com.."},
 		// 4. escaped `*` in the middle - NOT OK.
-		{escaped: `e\\052ample.com`, wantErr: errors.New("`*' ony supported as wildcard (leftmost label)")},
+		{escaped: `e\\052ample.com`, wantErr: errors.New("`*' only supported as wildcard (leftmost label)")},
 		// 5. Invalid character.
 		{escaped: `\\000.example.com`, wantErr: errors.New(`invalid character: \\000`)},
 		// 6. Invalid escape sequence in the middle.

plugin/sign/sign.go

@@ -31,7 +31,7 @@ const (
 	DurationSignatureExpireDays     = 32 * 24 * time.Hour // sign for 32 days
 	DurationRefreshHours            = 5 * time.Hour       // check zones every 5 hours
 	DurationJitter                  = -18 * time.Hour     // default max jitter
-	DurationSignatureInceptionHours = -3 * time.Hour      // -(2+1) hours, be sure to catch daylight saving time and such, jitter is substracted
+	DurationSignatureInceptionHours = -3 * time.Hour      // -(2+1) hours, be sure to catch daylight saving time and such, jitter is subtracted
 )
 
 const timeFmt = "2006-01-02T15:04:05.000Z07:00"