pdns: allow empty string in version-string

This change allow an empty string to be returned to CHAOS version.bind
request. version-string by default is set to "full" through
pdns/auth-main.cc declareArguments(), however does not allow an empty
string to be returned as PowerDNS Recursor does.

diff --git a/pdns/packethandler.cc b/pdns/packethandler.cc
index d06e4724e127e8c153a22a5ec706e71affb02399..94d729e75ebdc9ae0fba71e3342386f5e7263eb2 100644 (file)
--- a/pdns/packethandler.cc
+++ b/pdns/packethandler.cc
@@ -288,7 +288,7 @@ int PacketHandler::doChaosRequest(const DNSPacket& p, std::unique_ptr<DNSPacket>
       // modes: full, powerdns only, anonymous or custom
       const static string mode=::arg()["version-string"];
       string content;
-      if(mode.empty() || mode=="full")
+      if(mode=="full")
         content=fullVersionString();
       else if(mode=="powerdns")
         content="Served by PowerDNS - https://www.powerdns.com/";