message: Add limitfreerelay to getnetworkinfo()
diff: #include "sync.h"
  #include "timedata.h"
  #include "tweak.h"
  +#include "txadmission.h"
  #include "ui_interface.h"
  #include "unlimited.h"
  #include "util.h"
  @@ -554,6 +555,8 @@ UniValue getnetworkinfo(const UniValue &params, bool fHelp)
  "considered free and subject to limitfreerelay\n"
  " \"maxlimitertxfee\": x.xxxx, (numeric) fee (in satoshi/byte) above which transactions are "
  "always relayed\n"
  + " \"limitfreerelay\": x.xxxx, (numeric) The maximum number of free transactions (in KB) that "
  + "can enter the mempool per minute\n"
  " \"localaddresses\": [ (array) list of local addresses\n"
  " {\n"
  " \"address\": \"xxxx\", (string) network address\n"
  @@ -584,6 +587,7 @@ UniValue getnetworkinfo(const UniValue &params, bool fHelp)
  obj.pushKV("relayfee", ValueFromAmount(::minRelayTxFee.GetFeePerK()));
  obj.pushKV("minlimitertxfee", strprintf("%.4f", dMinLimiterTxFee.Value()));
  obj.pushKV("maxlimitertxfee", strprintf("%.4f", dMaxLimiterTxFee.Value()));
  + obj.pushKV("limitfreerelay", strprintf("%.4f", GetArg("-limitfreerelay", DEFAULT_LIMITFREERELAY)));
  UniValue localAddresses(UniValue::VARR);
  {
  LOCK(cs_mapLocalHost);
  