Fix the check-docs script

We broke it when we added anchors to the manpage.

This patch fixes it, and makes it sorta detect missing anchors.

doc/tor.1.txt

@@ -491,15 +491,15 @@ GENERAL OPTIONS
     attacker who obtains the logs. If only one severity level is given, all
     messages of that level or higher will be sent to the listed destination.
 
-**Log** __minSeverity__[-__maxSeverity__] **file** __FILENAME__::
+[[Log2]] **Log** __minSeverity__[-__maxSeverity__] **file** __FILENAME__::
     As above, but send log messages to the listed filename. The
     "Log" option may appear more than once in a configuration file.
     Messages are sent to all the logs that match their severity
     level.
 
-**Log** **[**__domain__,...**]**__minSeverity__[-__maxSeverity__] ... **file** __FILENAME__ +
+[[Log3]] **Log** **[**__domain__,...**]**__minSeverity__[-__maxSeverity__] ... **file** __FILENAME__ +
 
-**Log** **[**__domain__,...**]**__minSeverity__[-__maxSeverity__] ... **stderr**|**stdout**|**syslog**::
+[[Log4]] **Log** **[**__domain__,...**]**__minSeverity__[-__maxSeverity__] ... **stderr**|**stdout**|**syslog**::
     As above, but select messages by range of log severity __and__ by a
     set of "logging domains".  Each logging domain corresponds to an area of
     functionality inside Tor.  You can specify any number of severity ranges
@@ -2197,7 +2197,7 @@ The following options are used for running a testing Tor network.
     Try this often to download a v3 authority certificate before giving up.
     Changing this requires that **TestingTorNetwork** is set. (Default: 8)
 
-**TestingDirAuthVoteGuard** __node__,__node__,__...__::
+[[TestingDirAuthVoteGuard]] **TestingDirAuthVoteGuard** __node__,__node__,__...__::
     A list of identity fingerprints, nicknames, country codes and
     address patterns of nodes to vote Guard for regardless of their
     uptime and bandwidth. See the **ExcludeNodes** option for more

scripts/maint/checkOptionDocs.pl

@@ -41,8 +41,9 @@ loadTorrc("./src/config/torrc.sample.in", \%torrcSampleOptions);
 my $considerNextLine = 0;
 open(F, "./doc/tor.1.txt") or die;
 while (<F>) {
-    if (m!^\*\*([A-Za-z0-9_]+)\*\*!) {
-        $manPageOptions{$1} = 1;
+    if (m!^(?:\[\[([A-za-z0-9_]+)\]\] *)?\*\*([A-Za-z0-9_]+)\*\*!) {
+        $manPageOptions{$2} = 1;
+	print "Missing an anchor: $2\n" unless (defined $1 or $2 eq 'tor');
     }
 }
 close F;