Revert "Add an "auto" option to UseBridges"

This reverts commit 507c1257a4d9c629fefc2adbad8db73607749734.

src/or/config.c

@@ -376,7 +376,7 @@ static config_var_t _option_vars[] = {
   V(TransPort,                   PORT,     "0"),
   V(TunnelDirConns,              BOOL,     "1"),
   V(UpdateBridgesFromAuthority,  BOOL,     "0"),
-  VAR("UseBridges",              STRING,   UseBridges_, "auto"),
+  V(UseBridges,                  BOOL,     "0"),
   V(UseEntryGuards,              BOOL,     "1"),
   V(User,                        STRING,   NULL),
   VAR("V1AuthoritativeDirectory",BOOL, V1AuthoritativeDir,   "0"),
@@ -3234,19 +3234,6 @@ options_validate(or_options_t *old_options, or_options_t *options,
            "of the Internet, so they must not set Reachable*Addresses "
            "or FascistFirewall.");
 
-  /* XXX023 use autobool instead. */
-  if (!strcmp(options->UseBridges_, "auto")) {
-    options->UseBridges = (options->Bridges &&
-                           !server_mode(options) &&
-                           !options->EntryNodes);
-  } else if (!strcmp(options->UseBridges_, "0")) {
-    options->UseBridges = 0;
-  } else if (!strcmp(options->UseBridges_, "1")) {
-    options->UseBridges = 1;
-  } else {
-    REJECT("UseBridges must be 0, 1, or auto");
-  }
-
   if (options->UseBridges &&
       server_mode(options))
     REJECT("Servers must be able to freely connect to the rest "
@@ -3581,8 +3568,10 @@ options_validate(or_options_t *old_options, or_options_t *options,
   if (validate_dir_authorities(options, old_options) < 0)
     REJECT("Directory authority line did not parse. See logs for details.");
 
+  if (options->UseBridges && !options->Bridges)
+    REJECT("If you set UseBridges, you must specify at least one bridge.");
   if (options->UseBridges && !options->TunnelDirConns)
-    REJECT("TunnelDirConns set to 0 only works with UseBridges set to 0");
+    REJECT("If you set UseBridges, you must set TunnelDirConns.");
   if (options->Bridges) {
     for (cl = options->Bridges; cl; cl = cl->next) {
       if (parse_bridge_line(cl->value, 1)<0)

src/or/or.h

@@ -2480,17 +2480,7 @@ typedef struct {
    * when doing so. */
   char *BridgePassword;
 
-  /** Whether we should start all circuits with a bridge. "1" means strictly
-   * yes, "0" means strictly no, and "auto" means that we do iff any bridges
-   * are configured, we are not running a server and have not specified a list
-   * of entry nodes. */
-  char *UseBridges_;
-  /** Effective value of UseBridges. Will be set equally for UseBridges set to
-   * 1 or 0, but for 'auto' it will be set to 1 iff any bridges are
-   * configured, we are not running a server and have not specified a list of
-   * entry nodes. */
-  int UseBridges;
-
+  int UseBridges; /**< Boolean: should we start all circuits with a bridge? */
   config_line_t *Bridges; /**< List of bootstrap bridge addresses. */
 
   int BridgeRelay; /**< Boolean: are we acting as a bridge relay? We make