Fix NSS format session output

Commit 189ae368 (RT ticket 3352) provided the capability to output
session key data in NSS format. The big apps cleanup broke that capability.
This commit restores it.

RT#4201
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>

apps/sess_id.c

@@ -74,7 +74,7 @@ typedef enum OPTION_choice {
 OPTIONS sess_id_options[] = {
     {"help", OPT_HELP, '-', "Display this summary"},
     {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
-    {"outform", OPT_OUTFORM, 'F',
+    {"outform", OPT_OUTFORM, 'f',
      "Output format - default PEM (PEM, DER or NSS)"},
     {"in", OPT_IN, 's', "Input file - default stdin"},
     {"out", OPT_OUT, 's', "Output file - default stdout"},
@@ -114,7 +114,8 @@ int sess_id_main(int argc, char **argv)
                 goto opthelp;
             break;
         case OPT_OUTFORM:
-            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
+            if (!opt_format(opt_arg(), OPT_FMT_PEMDER | OPT_FMT_NSS,
+                            &outformat))
                 goto opthelp;
             break;
         case OPT_IN: