fix: DNS accept a valid reply

What a very stupid mistake: in the retry loop for doing the DNS queries, stop
when we get a successful result.

This should speed things up a bit, and ensure that a successful result is
remembered instead of only the last query (after some hammering) mattering.

resolve.go

@@ -155,6 +155,9 @@ DNS_RRTYPE_LOOP:
 					r = nil
 					continue DNS_RESOLVER_LOOP
 				}
+				if r != nil {
+					break
+				}
 			}
 
 			if r == nil {

version.go

@@ -13,7 +13,7 @@ import (
 const ProjectName = "smtpdane"
 
 // may be updated by the linker on the link command-line when compiling
-var Version string = "0.4.0"
+var Version string = "0.4.1"
 
 func version() {
 	fmt.Printf("%s version %s\n", ProjectName, Version)