Improve readability of CAddrInfo::IsTerrible

- Replaced 86400 with 24*60*60
- Remove references to specific timespans in comments

Github-Pull: #4724

src/addrman.cpp

@@ -45,13 +45,13 @@ bool CAddrInfo::IsTerrible(int64_t nNow) const
     if (nTime > nNow + 10*60) // came in a flying DeLorean
         return true;
 
-    if (nTime==0 || nNow-nTime > ADDRMAN_HORIZON_DAYS*86400) // not seen in over a month
+    if (nTime==0 || nNow-nTime > ADDRMAN_HORIZON_DAYS*24*60*60) // not seen in recent history
         return true;
 
-    if (nLastSuccess==0 && nAttempts>=ADDRMAN_RETRIES) // tried three times and never a success
+    if (nLastSuccess==0 && nAttempts>=ADDRMAN_RETRIES) // tried N times and never a success
         return true;
 
-    if (nNow-nLastSuccess > ADDRMAN_MIN_FAIL_DAYS*86400 && nAttempts>=ADDRMAN_MAX_FAILURES) // 10 successive failures in the last week
+    if (nNow-nLastSuccess > ADDRMAN_MIN_FAIL_DAYS*24*60*60 && nAttempts>=ADDRMAN_MAX_FAILURES) // N successive failures in the last week
         return true;
 
     return false;