init: amend ZMQ flag names

src/init.cpp

@@ -409,9 +409,9 @@ std::string HelpMessage(HelpMessageMode mode)
 #if ENABLE_ZMQ
     strUsage += HelpMessageGroup(_("ZeroMQ notification options:"));
     strUsage += HelpMessageOpt("-zmqpubhashblock=<address>", _("Enable publish hash block in <address>"));
-    strUsage += HelpMessageOpt("-zmqpubhashtransaction=<address>", _("Enable publish hash transaction in <address>"));
+    strUsage += HelpMessageOpt("-zmqpubhashtx=<address>", _("Enable publish hash transaction in <address>"));
     strUsage += HelpMessageOpt("-zmqpubrawblock=<address>", _("Enable publish raw block in <address>"));
-    strUsage += HelpMessageOpt("-zmqpubrawtransaction=<address>", _("Enable publish raw transaction in <address>"));
+    strUsage += HelpMessageOpt("-zmqpubrawtx=<address>", _("Enable publish raw transaction in <address>"));
 #endif
 
     strUsage += HelpMessageGroup(_("Debugging/Testing options:"));