+--- 1.6.20 2012/09/21
+
+Rank algorithm details may be printed as part of show reseponse in
+element <relevance_info>.. This is only printed if <rank debug="yes"/>
+is used in service.
+
+Record as returned by show/record command have a minimal indentation
+which makes things human-readable.
+
+--- 1.6.19 2012/09/18
+
+Rank algorithm skips strings that gets normalized to empty string.
+For example, & and ! could map to the empty string. The weight for
+those terms is now 0 (as if they were not part of the query).
+
+Rank algorithm does not use CCL from limitmap; only from the query
+parameter (user query).
+
+Obey -w dir.
+
+--- 1.6.18 2012/09/17
+
+Rank algorithm configurable by 'rank' element inside service. So far
+only, attribute 'cluster' is recognized. If cluster="yes", multiple
+records inside a cluster boosts higher than single records. This
+is default behavior and existing behavior. cluster="no" takes the
+average score of each record in a cluster.
+
+--- 1.6.17 2012/09/05
+
+Fix bad re-use of connections (connections with changing proxy should not
+be reused).
+
+--- 1.6.16 2012/08/22
+
+Fix a bug introduce in 1.6.15 around the position sorting. It resetted the
+resultset and sorting when the sort order is position. However this will be done on
+every client poll, which will make pazpar2 continuing reset and fetching.
+It should only be done on FIRST request where the sort order change.
+
+Fix an issue on suggestion option: Also disable suggestions on empty string.
+
+Clean up in turbo marc stylesheet.
+
+Remove the hardcoded size of termlists.
+
+--- 1.6.15 2012/06/27
+
+New facility: ccldirective may be given in service definition. Allows
+CCL parsing to be customized a bit, such as defining names of operators
+and, or, not.
+
+New facility: raw record by checksum, rather than offset. The record
+command optionally takes checksum which identifies certain record from
+a database.
+
+New facility: per field ranking. Rank may be given as M [F N] where
+M is default rank and N is rank for CCL terms from field F.
+
+--- 1.6.14 2012/06/04
+
+Fix for IE7/8 in pz.js
+
+Applied patch from Giannis Kosmas on keepAlive, which also adds keepAlive to init response.
+
+Lower log level some places.
+
+Remove some invalid test results.
+
+--- 1.6.13 2012/05/23
+
+Introducing a version=2 parameter for show, termlist and bytarget commands.
+This enables pazpar2 to return approximation on hit and count count when
+doing record filtering using the limit parameter on search and a
+limitmap with a value of "local:"
+