Update help message to match the #4219 change

src/init.cpp

@@ -361,7 +361,7 @@ std::string HelpMessage(HelpMessageMode mode)
     if (mode == HMM_BITCOIN_QT)
         debugCategories += ", qt";
     strUsage += HelpMessageOpt("-debug=<category>", strprintf(_("Output debugging information (default: %u, supplying <category> is optional)"), 0) + ". " +
-        _("If <category> is not supplied, output all debugging information.") + _("<category> can be:") + " " + debugCategories + ".");
+        _("If <category> is not supplied or if <category> = 1, output all debugging information.") + _("<category> can be:") + " " + debugCategories + ".");
 #ifdef ENABLE_WALLET
     strUsage += HelpMessageOpt("-gen", strprintf(_("Generate coins (default: %u)"), 0));
     strUsage += HelpMessageOpt("-genproclimit=<n>", strprintf(_("Set the number of threads for coin generation if enabled (-1 = all cores, default: %d)"), 1));