Merge bitcoin#11289: Add wallet backup text to import* and add* RPCs

c098c58 Wrap dumpwallet warning and note scripts aren't dumped (MeshCollider)
a38bfbc Add wallet backup text to import*, add* and dumpwallet RPCs (MeshCollider)

Pull request description:

  Closes bitcoin#11243

  Adds "Requires a new wallet backup" text to `addwitnessaddress`, `importprivkey`, `importmulti`, `importaddress`, `importpubkey`, and `addmultisigaddress`. Also adds a warning to `dumpwallet` that backing up the seed alone is not sufficient to back up non-HD addresses

Tree-SHA512: 76d7cdca54d5b458acf479154620322391b889922525fddd6153f4164cfee393ad743757400cb8f6b1b30f24947df68ea9043b4e509f7df77a8fa05dda370933

src/wallet/rpcdump.cpp

@@ -81,7 +81,7 @@ UniValue importprivkey(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 3)
         throw std::runtime_error(
             "importprivkey \"privkey\" ( \"label\" ) ( rescan )\n"
-            "\nAdds a private key (as returned by dumpprivkey) to your wallet.\n"
+            "\nAdds a private key (as returned by dumpprivkey) to your wallet. Requires a new wallet backup.\n"
             "\nArguments:\n"
             "1. \"privkey\"          (string, required) The private key (see dumpprivkey)\n"
             "2. \"label\"            (string, optional, default=\"\") An optional label\n"
@@ -226,7 +226,7 @@ UniValue importaddress(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 4)
         throw std::runtime_error(
             "importaddress \"address\" ( \"label\" rescan p2sh )\n"
-            "\nAdds a script (in hex) or address that can be watched as if it were in your wallet but cannot be used to spend.\n"
+            "\nAdds a script (in hex) or address that can be watched as if it were in your wallet but cannot be used to spend. Requires a new wallet backup.\n"
             "\nArguments:\n"
             "1. \"script\"           (string, required) The hex-encoded script (or address)\n"
             "2. \"label\"            (string, optional, default=\"\") An optional label\n"
@@ -396,7 +396,7 @@ UniValue importpubkey(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 4)
         throw std::runtime_error(
             "importpubkey \"pubkey\" ( \"label\" rescan )\n"
-            "\nAdds a public key (in hex) that can be watched as if it were in your wallet but cannot be used to spend.\n"
+            "\nAdds a public key (in hex) that can be watched as if it were in your wallet but cannot be used to spend. Requires a new wallet backup.\n"
             "\nArguments:\n"
             "1. \"pubkey\"           (string, required) The hex-encoded public key\n"
             "2. \"label\"            (string, optional, default=\"\") An optional label\n"
@@ -456,7 +456,7 @@ UniValue importwallet(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() != 1)
         throw std::runtime_error(
             "importwallet \"filename\"\n"
-            "\nImports keys from a wallet dump file (see dumpwallet).\n"
+            "\nImports keys from a wallet dump file (see dumpwallet). Requires a new wallet backup to include imported keys.\n"
             "\nArguments:\n"
             "1. \"filename\"    (string, required) The wallet file\n"
             "\nExamples:\n"
@@ -601,6 +601,9 @@ UniValue dumpwallet(const JSONRPCRequest& request)
         throw std::runtime_error(
             "dumpwallet \"filename\"\n"
             "\nDumps all wallet keys in a human-readable format to a server-side file. This does not allow overwriting existing files.\n"
+            "Imported scripts are not currently included in wallet dumps, these must be backed up separately.\n"
+            "Note that if your wallet contains keys which are not derived from your HD seed (e.g. imported keys), these are not covered by\n"
+            "only backing up the seed itself, and must be backed up too (e.g. ensure you back up the whole dumpfile).\n"
             "\nArguments:\n"
             "1. \"filename\"    (string, required) The filename with path (either absolute or relative to bitcoind)\n"
             "\nResult:\n"
@@ -1039,7 +1042,7 @@ UniValue importmulti(const JSONRPCRequest& mainRequest)
     if (mainRequest.fHelp || mainRequest.params.size() < 1 || mainRequest.params.size() > 2)
         throw std::runtime_error(
             "importmulti \"requests\" ( \"options\" )\n\n"
-            "Import addresses/scripts (with private or public keys, redeem script (P2SH)), rescanning all addresses in one-shot-only (rescan can be disabled via options).\n\n"
+            "Import addresses/scripts (with private or public keys, redeem script (P2SH)), rescanning all addresses in one-shot-only (rescan can be disabled via options). Requires a new wallet backup.\n\n"
             "Arguments:\n"
             "1. requests     (array, required) Data to be imported\n"
             "  [     (array of json objects)\n"

src/wallet/rpcwallet.cpp

@@ -1110,7 +1110,7 @@ UniValue addmultisigaddress(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 3)
     {
         std::string msg = "addmultisigaddress nrequired [\"key\",...] ( \"account\" )\n"
-            "\nAdd a nrequired-to-sign multisignature address to the wallet.\n"
+            "\nAdd a nrequired-to-sign multisignature address to the wallet. Requires a new wallet backup.\n"
             "Each key is a Bitcoin address or hex-encoded public key.\n"
             "If 'account' is specified (DEPRECATED), assign address to that account.\n"
 
@@ -1228,7 +1228,7 @@ UniValue addwitnessaddress(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
     {
         std::string msg = "addwitnessaddress \"address\" ( p2sh )\n"
-            "\nAdd a witness address for a script (with pubkey or redeemscript known).\n"
+            "\nAdd a witness address for a script (with pubkey or redeemscript known). Requires a new wallet backup.\n"
             "It returns the witness script.\n"
 
             "\nArguments:\n"