Merge pull request bitcoin#7290

fa461df Clarify mocktime help message (MarcoFalke)
faa572a [init] Help Msg: Use Params(CBaseChainParams::MAIN) (MarcoFalke)
fa6ab96 [init] Add missing help for args (MarcoFalke)
fac11ea [init] Fix error message of maxtxfee invalid amount (MarcoFalke)

Author: laanwj

src/init.cpp

@@ -390,7 +390,7 @@ std::string HelpMessage(HelpMessageMode mode)
     // When adding new options to the categories, please keep and ensure alphabetical ordering.
     // Do not translate _(...) -help-debug options, Many technical terms, and only a very small audience, so is unnecessary stress to translators.
     string strUsage = HelpMessageGroup(_("Options:"));
-    strUsage += HelpMessageOpt("-?", _("This help message"));
+    strUsage += HelpMessageOpt("-?", _("Print this help message and exit"));
     strUsage += HelpMessageOpt("-version", _("Print version and exit"));
     strUsage += HelpMessageOpt("-alerts", strprintf(_("Receive and display P2P network alerts (default: %u)"), DEFAULT_ALERTS));
     strUsage += HelpMessageOpt("-alertnotify=<cmd>", _("Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message)"));