[Solr Wiki] Trivial Update of "DistributedSearch" by FuadEfendi

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The following page has been changed by FuadEfendi:
http://wiki.apache.org/solr/DistributedSearch

The comment on the change is:
Limit for GET is not defined in RFC 2616; dependens on mod_ajp, HttpClient, ...

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     * The index could change between stages, e.g. a document that matched a query and was subsequently changed may no longer match but will still be retrieved.
     * Doesn't currently support date faceting
     * Currently only supports sorted field facets (Solr 1.4+ supports both)
+    * Number of shards is limited by number of characters allowed for GET method's URI; most web servers generally support at least 4000 characters, but limit still exists to prevent denial-of-service attacks.
  
  === Distributed Deadlock ===
  Each shard may also serve top-level query requests and then make sub-requests to all of the other shards.