auth: limit long version strings to 63 characters and catch exceptions in secpoll

Author: mind04

pdns/common_startup.cc

@@ -342,7 +342,10 @@ void mainthread()
 
 #ifndef WIN32
 
-   doSecPoll(true); // this must be BEFORE chroot
+   try {
+     doSecPoll(true); // this must be BEFORE chroot
+   }
+   catch(...) {}
 
    if(!::arg()["chroot"].empty()) {  
      if(::arg().mustDo("master") || ::arg().mustDo("slave"))

pdns/secpoll-auth.cc

@@ -125,7 +125,8 @@ void doSecPoll(bool first)
   struct timeval now;
   gettimeofday(&now, 0);
 
-  string query = "auth-" + string(PACKAGEVERSION) +".security-status."+::arg()["security-poll-suffix"];
+  string version = "auth-" + string(PACKAGEVERSION);
+  string query = version.substr(0, 63) +".security-status."+::arg()["security-poll-suffix"];
 
   if(*query.rbegin()!='.')
     query+='.';