banman: Add, use CBanEntry ctor that takes ban reason

src/addrdb.h

@@ -43,6 +43,11 @@ public:
         nCreateTime = nCreateTimeIn;
     }
 
+    explicit CBanEntry(int64_t n_create_time_in, BanReason ban_reason_in) : CBanEntry(n_create_time_in)
+    {
+        banReason = ban_reason_in;
+    }
+
     ADD_SERIALIZE_METHODS;
 
     template <typename Stream, typename Operation>

src/banman.cpp

@@ -102,8 +102,7 @@ void BanMan::Ban(const CNetAddr& netAddr, const BanReason& banReason, int64_t ba
 
 void BanMan::Ban(const CSubNet& subNet, const BanReason& banReason, int64_t bantimeoffset, bool sinceUnixEpoch)
 {
-    CBanEntry banEntry(GetTime());
-    banEntry.banReason = banReason;
+    CBanEntry banEntry(GetTime(), banReason);
 
     int64_t normalized_bantimeoffset = bantimeoffset;
     bool normalized_sinceUnixEpoch = sinceUnixEpoch;