[Bug network/19573] res_nclose and __res_maybe_init disagree about name server initialization, breaking Hesiod

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19573

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2d1f6790183dabf54c5b05be97d3872dab720c83

commit 2d1f6790183dabf54c5b05be97d3872dab720c83
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon May 2 15:25:20 2016 +0200

    hesiod: Always use thread-local resolver state [BZ #19573]

    The Hesiod implementation imported into glibc was enhanced
    to support caller-supplied resolver states.  But its only
    consumer is nss_hesiod, and it supplies the thread-local
    resolver state.  Therefore, this commit changes the Hesiod
    implementation to use the thread-local resolver state (_res)
    directly.  This fixes bug 19573 because the Hesiod
    implementation no longer has to initialize and free any
    resolver state.

    To avoid any risk of interposition of ABI-incompatible Hesiod
    function implementations, this commit marks the Hesiod functions
    as hidden.  (They were already hidden using a linker version
    script.)

    (cherry picked from commit 5018f16c6205404ba3aa7298dc8a3d45fbd46bfc)

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8a756c076eee041f7d231334480f96bebb0d8e29

commit 8a756c076eee041f7d231334480f96bebb0d8e29
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon May 2 12:07:09 2016 +0200

    hesiod: Remove RCS keywords

    (cherry picked from commit dbdc657dc0b962ef3ac61585c81e0828d8da42ee)

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                          |   31 +++++++++++++
 hesiod/Makefile                    |    2 +-
 hesiod/hesiod.c                    |   87 +++++++----------------------------
 hesiod/hesiod.h                    |   34 +++++++++-----
 hesiod/hesiod_p.h                  |   26 +++++++----
 hesiod/nss_hesiod/hesiod-grp.c     |    8 +---
 hesiod/nss_hesiod/hesiod-init.c    |   38 ----------------
 hesiod/nss_hesiod/hesiod-proto.c   |    5 +--
 hesiod/nss_hesiod/hesiod-pwd.c     |    5 +--
 hesiod/nss_hesiod/hesiod-service.c |    5 +--
 hesiod/nss_hesiod/nss_hesiod.h     |   20 --------
 11 files changed, 94 insertions(+), 167 deletions(-)
 delete mode 100644 hesiod/nss_hesiod/hesiod-init.c
 delete mode 100644 hesiod/nss_hesiod/nss_hesiod.h

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