Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig.

(Many users have no idea what a resolv.conf is, and shouldn't be forced to learn.  The old option will keep working for now.)
Also, document it.

svn:r17661

src/or/config.c

@@ -85,6 +85,7 @@ static config_abbrev_t _option_abbrevs[] = {
   { "NumEntryNodes", "NumEntryGuards", 0, 0},
   { "ResolvConf", "ServerDNSResolvConfFile", 0, 1},
   { "SearchDomains", "ServerDNSSearchDomains", 0, 1},
+  { "ServerDNSAllowBrokenResolvConf", "SeverDNSAllowBrokenConfig", 0, 0 },
   { "PreferTunnelledDirConns", "PreferTunneledDirConns", 0, 0},
   { "BridgeAuthoritativeDirectory", "BridgeAuthoritativeDir", 0, 0},
   { "HashedControlPassword", "__HashedControlSessionPassword", 1, 0},
@@ -290,7 +291,7 @@ static config_var_t _option_vars[] = {
   V(RunTesting,                  BOOL,     "0"),
   V(SafeLogging,                 BOOL,     "1"),
   V(SafeSocks,                   BOOL,     "0"),
-  V(ServerDNSAllowBrokenResolvConf, BOOL,  "1"),
+  V(ServerDNSAllowBrokenConfig,  BOOL,     "1"),
   V(ServerDNSAllowNonRFC953Hostnames, BOOL,"0"),
   V(ServerDNSDetectHijacking,    BOOL,     "1"),
   V(ServerDNSRandomizeCase,      BOOL,     "1"),
@@ -345,7 +346,7 @@ static config_var_t _option_vars[] = {
 
 /* Keep defaults synchronous with man page and config value check. */
 static config_var_t testing_tor_network_defaults[] = {
-  V(ServerDNSAllowBrokenResolvConf, BOOL,  "1"),
+  V(ServerDNSAllowBrokenConfig,  BOOL,  "1"),
   V(DirAllowPrivateAddresses,    BOOL,     "1"),
   V(EnforceDistinctSubnets,      BOOL,     "0"),
   V(AssumeReachable,             BOOL,     "1"),

src/or/main.c

@@ -1386,7 +1386,7 @@ do_main_loop(void)
 
   /* initialize dns resolve map, spawn workers if needed */
   if (dns_init() < 0) {
-    if (get_options()->ServerDNSAllowBrokenResolvConf)
+    if (get_options()->ServerDNSAllowBrokenConfig)
       log_warn(LD_GENERAL, "Couldn't set up any working nameservers. "
                "Network not up yet?  Will try again soon.");
     else {

src/or/or.h

@@ -2462,7 +2462,7 @@ typedef struct {
                     will know this without any specialized knowledge. */
   /** Boolean: if set, we start even if our resolv.conf file is missing
    * or broken. */
-  int ServerDNSAllowBrokenResolvConf;
+  int ServerDNSAllowBrokenConfig;
 
   smartlist_t *ServerDNSTestAddresses; /**< A list of addresses that definitely
                                         * should be resolveable. Used for