[Solr Wiki] Update of "FAQ" by HossMan

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The "FAQ" page has been changed by HossMan.
The comment on this change is: outdated advice about needing to optimize after delete all.
http://wiki.apache.org/solr/FAQ?action=diff&rev1=70&rev2=71

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  == How can I rebuild my index from scratch if I change my schema? ==
  
+  1. Use the "match all docs" query in a delete by query command before shutting down Solr: {{{<delete><query>*:*</query></delete>}}}
-  1. Stop your application server
+  1. Stop your server
-  1. Change your schema.xml file
+  1. Change your schema.xml
-  1. Start your application server
+  1. Start your server
-  1. Delete the `index` directory in your data directory, or alternately use the "match all docs" query in a delete by query command before shutting down Solr: {{{<delete><query>*:*</query></delete>}}}
-  1. Send an {{{<optimize/>}}} command.
   1. Re-Index your data
  
- One can also delete all documents, change the schema.xml file, and then reload the core w/o shutting down Solr.
+ One can also delete all documents, change the schema.xml file, and then [[CoreAdmin|reload the core]] w/o shutting down Solr.
  
  == How can I update a specific field of an existing document? ==