Update man page, now that *Statistics can be changed while Tor is running.

doc/tor.1.txt

@@ -965,23 +965,20 @@ is non-zero):
 
 **CellStatistics** **0**|**1**::
     When this option is enabled, Tor writes statistics on the mean time that
-    cells spend in circuit queues to disk every 24 hours. Cannot be changed
-    while Tor is running. (Default: 0)
+    cells spend in circuit queues to disk every 24 hours. (Default: 0)
 
 **DirReqStatistics** **0**|**1**::
     When this option is enabled, Tor writes statistics on the number and
-    response time of network status requests to disk every 24 hours. Cannot be
-    changed while Tor is running. (Default: 0)
+    response time of network status requests to disk every 24 hours.
+    (Default: 0)
 
 **EntryStatistics** **0**|**1**::
     When this option is enabled, Tor writes statistics on the number of
-    directly connecting clients to disk every 24 hours. Cannot be changed while
-    Tor is running. (Default: 0)
+    directly connecting clients to disk every 24 hours. (Default: 0)
 
 **ExitPortStatistics** **0**|**1**::
     When this option is enabled, Tor writes statistics on the number of relayed
-    bytes and opened stream per exit port to disk every 24 hours. Cannot be
-    changed while Tor is running. (Default: 0)
+    bytes and opened stream per exit port to disk every 24 hours. (Default: 0)
 
 **ExtraInfoStatistics** **0**|**1**::
     When this option is enabled, Tor includes previously gathered statistics in