simplewallet: warn about key reuse on startup

src/simplewallet/simplewallet.cpp

@@ -7458,7 +7458,7 @@ int main(int argc, char* argv[])
   const auto vm = wallet_args::main(
    argc, argv,
    "monero-wallet-cli [--wallet-file=<file>|--generate-new-wallet=<file>] [<COMMAND>]",
-    sw::tr("This is the command line monero wallet. It needs to connect to a monero\ndaemon to work correctly."),
+    sw::tr("This is the command line monero wallet. It needs to connect to a monero\ndaemon to work correctly.\nWARNING: Do not reuse your Monero keys on an another fork, UNLESS this fork has key reuse mitigations built in. Doing so will harm your privacy."),
     desc_params,
     positional_options,
     [](const std::string &s, bool emphasis){ tools::scoped_message_writer(emphasis ? epee::console_color_white : epee::console_color_default, true) << s; },