Fixed a compilation problem (uninitialized var)
jsonrpc topps needs zlib
Merge branch 'plugin/jsonrpc' into release/5.2.1

Conflicts:
	configure.in
Updated zlib use
Merge branch 'plugin/write_top' into release/5.2.1
Updated zlib use
Merge branch 'plugin/notify_file' into release/5.2.1