Update help regarding new -wallet option for relative paths

src/init.cpp

@@ -454,7 +454,7 @@ std::string HelpMessage(HelpMessageMode mode)
     strUsage += HelpMessageOpt("-maxtxfee=<amt>", strprintf(_("Maximum total fees (in %s) to use in a single wallet transaction; setting this too low may abort large transactions (default: %s)"),
         CURRENCY_UNIT, FormatMoney(maxTxFee)));
     strUsage += HelpMessageOpt("-upgradewallet", _("Upgrade wallet to latest format") + " " + _("on startup"));
-    strUsage += HelpMessageOpt("-wallet=<file>", _("Specify wallet file (within data directory)") + " " + strprintf(_("(default: %s)"), "wallet.dat"));
+    strUsage += HelpMessageOpt("-wallet=<file>", _("Specify wallet file absolute path or a path relative to the data directory") + " " + strprintf(_("(default: %s)"), DEFAULT_WALLET_DAT));
     strUsage += HelpMessageOpt("-walletbroadcast", _("Make the wallet broadcast transactions") + " " + strprintf(_("(default: %u)"), true));
     strUsage += HelpMessageOpt("-walletnotify=<cmd>", _("Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)"));
     strUsage += HelpMessageOpt("-whitelistaddress=<Raddress>", _("Enable the wallet filter for notary nodes and add one Raddress to the whitelist of the wallet filter. If -whitelistaddress= is used, then the wallet filter is automatically activated. Several Raddresses can be defined using several -whitelistaddress= (similar to -addnode). The wallet filter will filter the utxo to only ones coming from my own Raddress (derived from pubkey) and each Raddress defined using -whitelistaddress= this option is mostly for Notary Nodes)."));

src/wallet/wallet.cpp

@@ -59,6 +59,7 @@ using namespace libzcash;
 /**
  * Settings
  */
+const char * DEFAULT_WALLET_DAT = "wallet.dat";
 CFeeRate payTxFee(DEFAULT_TRANSACTION_FEE);
 CAmount maxTxFee = DEFAULT_TRANSACTION_MAXFEE;
 unsigned int nTxConfirmTarget = DEFAULT_TX_CONFIRM_TARGET;

src/wallet/wallet.h

@@ -100,6 +100,8 @@ static const unsigned int DEFAULT_TX_RETENTION_LASTTX = 200;
 //Amount of transactions to delete per run while syncing
 static const int MAX_DELETE_TX_SIZE = 50000;
 
+extern const char * DEFAULT_WALLET_DAT;
+
 class CBlockIndex;
 class CCoinControl;
 class COutput;