-sqlftrgrp
template: commu?clnt=name|pass&com=sqlftrgrp&&whr=<where_pattern>
          Order of query params is not important.
descript: * | <SQL part following WHERE>. The '*' means all.
          A special syntax must be used: ':' for = and '|' for <space>.
          This is because spaces and '=' are replaced in WWW requests.
          Note that string values must be enclosed in single quotes.       
example : commu?clnt=name|pass&com=sqlftrgrp&whr=ftr:news
returns 200 OK, 401 (fail, request error), 501 (fail, server error)
200 OK  : in this case the response body is as follows
	<?xml version="1.0"?>
	<?xml-stylesheet type="text/xsl" href="/resp_xsl/user_profiles.xsl"?>
	<result>
	<row><group>feature group</group><ftr>feature</ftr><ftr_val>value</ftr_val></row>
	...
	</result>