Remove query doc from varnishlog

The query language has it's own doc page in varnish-query

doc/sphinx/reference/varnishlog.rst

@@ -69,170 +69,6 @@ The following options are available:
 
 	XXX: Not yet implemented
 
-
-DESCRIPTION
-===========
-
-Varnishlog is a utility to extract and query the Varnish shared memory
-log.
-
-Varnishlog operates on transactions. A transaction is a set of log
-lines that belongs together, e.g. a client request. Varnishlog will
-monitor the log, and collect all log records that make up a
-transaction before reporting on that transaction. Transactions can
-also be grouped, meaning backend transactions are reported together
-with the client transaction that initiated it.
-
-The grouping levels are:
-
-* Session
-
-  All transactions initiated by a client connection is reported
-  together. All log data is buffered until the client connection is
-  closed.
-
-* Request
-
-  Transactions are grouped by request, where the set will include the
-  request itself, and any backend requests or ESI-subrequests. Session
-  data is not reported. This is the default.
-
-* VXID
-
-  Transactions are not grouped, so each VXID is reported in it's
-  entirity. Sessions, requests, ESI-requests and backend requests are
-  all reported individually. Non-transactional data is not reported
-  (VXID == 0).
-
-* Raw
-
-  Every log record will make up a transaction of it's own. All data,
-  including non-transactional data will be reported.
-
-
-Grouping
-========
-
-When grouping transactions, there is a hirarchy structure showing
-which transaction initiated what. The level increases by one by a
-'initiated by' relation, so for example a backend transaction will
-have one higher level than the client transaction that initiated it on
-a cache miss.
-
-Example transaction hirarchy ::
-
-  Lvl 1: Client request (cache miss)
-    Lvl 2: Backend request
-    Lvl 2: ESI subrequest (cache miss)
-      Lvl 3: Backend request
-      Lvl 3: Backend request (VCL restart)
-      Lvl 3: ESI subrequest (cache miss)
-        Lvl 4: Backend request
-    Lvl 2: ESI subrequest (cache hit)
-
-Query operators will unless limited see a grouped set of transactions
-together, and matching will be done on any log line from the complete
-set. See QUERY LANGUAGE for how to limit a match to a specific part of
-the set.
-
-Running queries in session grouping mode can potentially consume a lot
-of memory.
-
-
-QUERY LANGUAGE
-==============
-
-XXX: As a POC only a single string is accepted as a query expression,
-and this will be used as a regular expression that will be matched
-against any log line of the set. The rest of the query language is yet
-to be implemented.
-
-The query expression is given as a single command line
-argument. Additional arguments will give an error.
-
-An expression consists of a single tag, or a comparison between a tag
-and a constant.
-
-A single tag expression is considered true if there is one or more
-records with that tag in the transaction.
-
-For all comparisons, the LHS must be a tag, and the RHS must be a
-constant.
-
-Constants must be quoted if they contain whitespace. You can use
-either single or double quotes.
-
-A comparison expression is true if the comparison is true for one or
-more records with that tag in the transaction.
-
-(be)?re(q|sp).(url|request|status|response) expands to their specific
-tags.
-
-(be)?re(q|sp).http.<header> expands to their corresponding
-(Ber|R)(eq|esp)Header tag, and for this comparison the value will be
-s/^(?i)<header>: //
-
-<tag>{n} will only match on a transaction at the nth level (see
-grouping). Levels starts counting at 0. If n is followed by a '+',
-it will only match at level n or higher. If n is followed by a '-', it
-will only match at level n or lower.
-
-<tag>[n] will consider the value of the tag to be a white-space
-separated field list, and extract the nth field for the comparison.
-
-<tag>#n adds a repetition counter to this match, and is true only if
-the match is true n times. n+ means n or more, n- means n or less.
-
-'==', '!=', '<', '<=', '>' and '>=' are numerical comparisons. Integer
-by default, or floating point if the RHS contains a dot. LHS will be
-transformed (atoi/atof) for comparison.
-
-'eq' and 'ne' are for string comparison.
-
-'~' and '!~' are PCRE regular expression comparisons.
-
-'not' is for negation
-
-'and' is concatenation
-
-'or' is alteration
-
-'not' has highest precedence, alternation and concatenation have equal
-precedence and associate left to right. Paranthesis can be used to
-group statements.
-
-QUERY EXAMPLES
-==============
-
-The following commands will list the entire client transaction of
-requests where the url is "/foo" ::
-
-	$ varnishlog -c 'req.url eq "/foo"'
-	$ varnishlog -c 'ReqURL eq "/foo"'
-
-The following command will list the URL of all requests that has a
-cookie-header ::
-
-	$ varnishlog -c -i ReqURL req.http.cookie
-	$ varnishlog -c -i ReqURL 'ReqHeader ~ "^Cookie: "'
-
-Report the User-Agent of logged in clients where the request delivery
-time exceeds exceeds 0.5 seconds ::
-
-	$ varnishlog -c -I RxHeader:User-Agent 'req.http.cookie ~
-	"logged_in" and ReqEnd[5] > 0.5'
-
-Report delivery status code of client requests that had one or more
-503 errors from backend requests ::
-
-	$ varnishlog -i TxStatus 'beresp.status == 503'
-
-Report transaction set on requests that has backend failures
-or long delivery time on their ESI subrequests ::
-
-	$ varnishlog 'beresp.status{2+} >= 500 or ReqEnd{1+}[5] > 0.5'
-
-
 TAGS
 ====
 The following log entry tags are currently defined:
@@ -296,6 +132,7 @@ SEE ALSO
 * varnishncsa(1)
 * varnishstat(1)
 * varnishtop(1)
+* vsl-query(7)
 
 HISTORY
 =======