Add SSL/auth code
https://github.com/Openwsman/wsmancli/issues/10#issuecomment-751253133

Index: amtterm.c
--- amtterm.c.orig
+++ amtterm.c
@@ -179,10 +179,18 @@ static void usage(FILE *fp)
             "   -h            print this text\n"
             "   -v            verbose (default)\n"
             "   -q            quiet\n"
+            "   -L            use legacy authentication\n"
+#if defined(USE_OPENSSL) || defined(USE_GNUTLS)
+            "   -C cacert     enable SSL and use PEM cacert file\n"
+#endif
             "   -u user       username (default: admin)\n"
             "   -p pass       password (default: $AMT_PASSWORD)\n"
             "\n"
+#if defined(USE_OPENSSL) || defined(USE_GNUTLS)
+            "By default port 16994 (SSL: 16995) is used.\n"
+#else
             "By default port 16994 is used.\n"
+#endif
 	    "If no password is given " APPNAME " will ask for one.\n"
             "\n"
             "-- \n"
@@ -209,7 +217,7 @@ int main(int argc, char *argv[])
 	snprintf(r.pass, sizeof(r.pass), "%s", h);
 
     for (;;) {
-        if (-1 == (c = getopt(argc, argv, "hvqu:p:")))
+        if (-1 == (c = getopt(argc, argv, "hvqu:p:LC:")))
             break;
         switch (c) {
 	case 'v':
@@ -225,6 +233,14 @@ int main(int argc, char *argv[])
 	    snprintf(r.pass, sizeof(r.pass), "%s", optarg);
 	    memset(optarg,'*',strlen(optarg)); /* rm passwd from ps list */
 	    break;
+	case 'L':
+	    r.legacy = 1;
+	    break;
+#if defined(USE_OPENSSL) || defined(USE_GNUTLS)
+	case 'C':
+	    r.cacert = optarg;
+	    break;
+#endif
 
         case 'h':
             usage(stdout);
