[Solr Wiki] Update of "FunctionQuery" by HossMan

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The following page has been changed by HossMan:
http://wiki.apache.org/solr/FunctionQuery

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  = Using FunctionQuery =
  There are a few ways to use FunctionQuery from Solr's HTTP interface:
   1. Embed a FunctionQuery in a regular query expressed in SolrQuerySyntax via the _val_ hook
+  1. Use the FunctionQ!ParserPlugin, ie: {{{q={!func}log(foo)}}}
-  2. Use a parameter that has an explicit type of FunctionQuery, such as DisMaxRequestHandler's '''bf''' (boost function) parameter.
+  1. Use a parameter that has an explicit type of FunctionQuery, such as DisMaxRequestHandler's '''bf''' (boost function) parameter.
       NOTE: the '''bf''' parameter actually takes a list of function queries separated by whitespace and each with an optional boost.  Make sure to eliminate any internal whitespace in single function queries when using '''bf'''.
       Example: {{{q=dismax&bf="ord(popularity)^0.5 recip(rord(price),1,1000,1000)^0.3"}}}