Don't start sandbox except for CMD_RUN_TOR

This was crashing on --verify-config in the debian startup script, if you
had sandboxing enabled.  Fixes 11609; fix on 0.2.5.1-alpha.

changes/bug11609

@@ -0,0 +1,5 @@
+  o Minor bugfixes (sandbox):
+    - Don't try to enable the sandbox when using the Tor binary to
+      check its configuration, hash a passphrase, or so on. Doing
+      so was crashing on startup for some users. Fixes bug 11609;
+      bugfix on 0.2.5.1-alpha.

src/or/main.c

@@ -2938,7 +2938,7 @@ tor_main(int argc, char *argv[])
   if (tor_init(argc, argv)<0)
     return -1;
 
-  if (get_options()->Sandbox) {
+  if (get_options()->Sandbox && get_options()->command == CMD_RUN_TOR) {
     sandbox_cfg_t* cfg = sandbox_init_filter();
 
     if (sandbox_init(cfg)) {