Add help for -equihashsolver= option.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

src/init.cpp

@@ -383,6 +383,7 @@ std::string HelpMessage(HelpMessageMode mode)
 #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));
+    strUsage += HelpMessageOpt("-equihashsolver=<name>", _("Specify the Equihash solver to be used if enabled (default: \"default\")"));
 #endif
     strUsage += HelpMessageOpt("-help-debug", _("Show all debugging options (usage: --help -help-debug)"));
     strUsage += HelpMessageOpt("-logips", strprintf(_("Include IP addresses in debug output (default: %u)"), 0));