Bugfixes
--------
* fix JSON output in xport with legend and gprint blocks
* fix parse_time mutex unlocking in the error case
* don't crash on invalid variable names in CDEF
* add mutex locking in rrdc_fetch
* fix buffer overflow in rrd_restore
* shorten test precision to 7 digits ...
* never exit from a library function
* buffer overflow in rrd_restore.c
Problems found with existing distfiles:
distfiles/D6.data.ros.gz
distfiles/cstore0.2.tar.gz
distfiles/data4.tar.gz
distfiles/sphinx-2.2.7-release.tar.gz
No changes made to the cstore or mariadb55-client distinfo files.
Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden). All existing
SHA1 digests retained for now as an audit trail.
New Features
------------
* allows rrdrestore to read input from stdin
* add documentation for RRDs::xport
* RPN operators MINNAN and MAXNAN
* --left-axis-format option to rrd_graph
Bugfixes
--------
* properly verify validity of user suplied format strings
* remove graph functions from python module when compiled without graphing
support
* verify that only short integers are used in COMPUTE rpn expressions
* eliminate duplicate setlocale calls
* fixed endless loop and double frees in rrd_restore
* fixed missing variable initializations in rrd_graph
* fixed JSON output format to actually be valid JSON
* detect failing fallocate and fall back to seeking
* fixed format string in ruby bindings
to address issues with NetBSD-6(and earlier)'s fontconfig not being
new enough for pango.
While doing that, also bump freetype2 dependency to current pkgsrc
version.
Suggested by tron in PR 47882
