Correct some typos while reading dir specs.

svn:r18266

doc/spec/dir-spec-v1.txt

@@ -5,7 +5,7 @@ $Id$
                               Roger Dingledine
                                Nick Mathewson
 
-0. Prelimaries
+0. Preliminaries
 
   THIS SPECIFICATION IS OBSOLETE.
 

doc/spec/dir-spec-v2.txt

@@ -587,7 +587,7 @@ $Id$
 
    The most recent network-status documents from all known authorities,
    concatenated, should be available at:
-         http://<hostname>/tor/status/all.z
+      http://<hostname>/tor/status/all.z
 
    The most recent descriptor for a server whose identity key has a
    fingerprint of <F> should be available at:
@@ -774,7 +774,7 @@ $Id$
    Circuits SHOULD NOT be built until the client has enough directory
    information: network-statuses (or failed attempts to download
    network-statuses) for all authorities, network-statuses for at more than
-   half of the authorites, and descriptors for at least 1/4 of the servers
+   half of the authorities, and descriptors for at least 1/4 of the servers
    believed to be running.
 
    A server is "listed" if it is included by more than half of the live

doc/spec/dir-spec.txt

@@ -1177,7 +1177,7 @@ $Id$
    of the router's actual capacity that the authority has.  For now,
    this should be the lesser of the observed bandwidth and bandwidth
    rate limit from the router descriptor.  It is given in kilobytes
-   per second, and capped at some arbitrary value (curently 10 MB/s).
+   per second, and capped at some arbitrary value (currently 10 MB/s).
 
    The ports listed in a "p" line should be taken as those ports for
    which the router's exit policy permits 'most' addresses, ignoring any
@@ -1258,7 +1258,7 @@ $Id$
           is taken from the votes that have the same policy summary
           for the descriptor we are listing.  (They should all be the
           same.  If they are not, we pick the most commonly listed
-          one, breaking ties in favor of the lexigraphically larger
+          one, breaking ties in favor of the lexicographically larger
           vote.)  The port list is encoded as specified in 3.4.2.
 
      The signatures at the end of a consensus document are sorted in