grep annotated tag, v2.28, created. v2.28

[Jim Meyering]

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The annotated tag, v2.28 has been created
        at  b57116c77f8a05edb40fdbe4bd9f4c30345b3595 (tag)
   tagging  7dcf17b25d8097ff6c52ccece7b7a86e2c077012 (commit)
  replaces  v2.27
 tagged by  Jim Meyering
        on  Mon Feb 6 17:17:30 2017 -0800

- Log -----------------------------------------------------------------
grep 2.28
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Arnold D. Robbins (1):
      build: update gnulib submodule to latest

Jim Meyering (11):
      maint: post-release administrivia
      maint: tell "syntax-check" not to worry about the NEWS update
      tests: use just-built grep in more places
      maint: fix "syntax-check" failure
      gnulib: update to latest, fixing a parallel getopt test failure
      maint: update gnulib and copyright dates for 2017
      maint: avoid new syntax-check failures
      tests: really add the new test name
      gnulib: update to latest
      gnulib: update to latest
      version 2.28

Norihiro Tanaka (2):
      grep: improve performance with multiple patterns
      grep -Fo could report a match that is not the longest

Paul Eggert (33):
      maint: clarify early-exit news for 2.27
      grep: simplify finalize_input
      grep: work around proc lseek glitch
      build: update gnulib submodule to latest
      build: update gnulib submodule to latest
      build: update gnulib submodule to latest
      grep: simplify line counting in patterns
      grep: simplify matcher configuration
      grep: fix performance with multiple patterns
      maint: rewrite to avoid some macros
      grep: remove C label
      grep: simplify Fexecute
      grep: specialize word-finding functions
      grep: speed up -wf in C locale
      grep: standardize on localeinfo.multibyte
      grep: improve word checking with UTF-8
      grep: fix comment in searchutils.c
      grep: minor performance tweak for pure functions
      grep: fix bug with '... | grep pat >> /dev/null'
      * NEWS: Fix typo.
      grep: int cleanup in kwset.c
      maint: space before paren
      grep: speed up -x with many patterns
      grep: improve comments, mostly in kwset
      dfa: prefer ptrdiff_t to size_t
      build: update gnulib submodule to latest
      Improve -i performance in typical UTF-8 searches
      * src/kwset.c: Fix comment typo.
      * NEWS: Fix typo.
      grep: remove Commentz-Walter code
      grep: speed up Aho-Corasick when at most 2 bytes
      grep: simplify recent kwset change
      grep: tune to avoid memchr2 sometimes

Zev Weiss (5):
      grep: prepare search backends for thread-safety
      dfasearch: thread safety
      kwsearch: thread safety
      pcresearch: thread safety
      grep: move localeinfo to grep.c

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