cups-browsed 2.0.1

[tillkamppeter]

Bug fix release: Collected fixes of one year, mainly reliability issues.

• Ignore attributes with IPP_TAG_NOVALUE
  We don't need to record attributes with IPP_TAG_NOVALUE value tag, cupsd will decide what to use based on the incoming document (Pull request cups-browsed.c: Ignore attributes with "no-value" #33).
• Ignore attributes with empty values
  Previously, if IPP attribute value was empty, cups-browsed saved the attribute as printer option "=0", e.g. orientation-requested=0. Often 0 is invalid and as no cluster member printer has this value therefore a job with this value gets rejected (Pull request cups-browsed.c: Ignore attributes with empty values #32).
• README.md: Use MarkDown for link to bug tracker
  (Pull request README.md: Fix formatting #31)
• Initialize variables to not get used uninitialized
  (Pull request Init variables which can be later used uninitialized #26)
• Fix memory leak found by valgrind
  (Pull request Init variables which can be later used uninitialized #26)
• Fix the daemon crash when get-printer-attributes fails
  cups-browsed crashed when it found a remote CUPS queue shared by mDNS on local network, but IPP request for this queue failed. The empty prattrs data structure is later accessed, which causes the crash (Pull request Fix the daemon crash when Get-Printer-Attributes fails #25).
• Better handle damage of queues created by cups-browsed
  cups-browsed-generated print queues are marked with a cups-browsed=true attribute. Sometimes it gets lost and the queue not considered cups-browsed-generated any more. As queues with implicitclass://... device URI are always from cups-browsed, ignore the missing flag and always restore them as cups-browsed queues, so that cups-browsed assigns a destination printer for each job (Issue #429)
• Fix build with Avahi disabled
  (Issue 2.0.0: fails to build with avahi support disabled (--disable-avahi) #19, Pull request cups-browsed.c: Fix build with avahi disabled #20)

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This discussion was created from the release cups-browsed 2.0.1.