update HelpMessage()

- place "-?" option at first
- re-work description and "\n" usage for Gavins new block creation options
  to better match current description syntax
- ensure no "\n" is in translated strings, which is better for Transifex

src/init.cpp

@@ -216,6 +216,7 @@ bool static Bind(const CService &addr, bool fError = true) {
 std::string HelpMessage()
 {
     string strUsage = _("Options:") + "\n" +
+        "  -?                     " + _("This help message") + "\n" +
         "  -conf=<file>           " + _("Specify configuration file (default: bitcoin.conf)") + "\n" +
         "  -pid=<file>            " + _("Specify pid file (default: bitcoind.pid)") + "\n" +
         "  -gen                   " + _("Generate coins") + "\n" +
@@ -279,15 +280,13 @@ std::string HelpMessage()
         "  -checkblocks=<n>       " + _("How many blocks to check at startup (default: 2500, 0 = all)") + "\n" +
         "  -checklevel=<n>        " + _("How thorough the block verification is (0-6, default: 1)") + "\n" +
         "  -loadblock=<file>      " + _("Imports blocks from external blk000?.dat file") + "\n" +
-        _("\nBlock creation options:\n") +
-        "  -blockminsize=<n>      "   + _("Minimum size, in bytes (default: 0)\n") +
-        "  -blockmaxsize=<n>      "   + _("Maximum size, in bytes (default: 250000)\n") +
-        "  -blockprioritysize=<n> "   + _("Maximum bytes of high-priority/low-fee transactions (default: 27000)\n") +
 
-        "  -?                     " + _("This help message") + "\n";
+        "\n" + _("Block creation options:") + "\n" +
+        "  -blockminsize=<n>      "   + _("Set minimum block size in bytes (default: 0)") + "\n" +
+        "  -blockmaxsize=<n>      "   + _("Set maximum block size in bytes (default: 250000)") + "\n" +
+        "  -blockprioritysize=<n> "   + _("Set maximum size of high-priority/low-fee transactions in bytes (default: 27000)") + "\n" +
 
-    strUsage += string() +
-        _("\nSSL options: (see the Bitcoin Wiki for SSL setup instructions)") + "\n" +
+        "\n" + _("SSL options: (see the Bitcoin Wiki for SSL setup instructions)") + "\n" +
         "  -rpcssl                                  " + _("Use OpenSSL (https) for JSON-RPC connections") + "\n" +
         "  -rpcsslcertificatechainfile=<file.cert>  " + _("Server certificate file (default: server.cert)") + "\n" +
         "  -rpcsslprivatekeyfile=<file.pem>         " + _("Server private key (default: server.pem)") + "\n" +