build: support gettext 0.20
support compiling if gettext 0.20 or later is found AM_GNU_GETTEXT_REQUIRE_VERSION overwrites AM_GNU_GETTEXT_VERSION if autoreconf supports it, so legacy systems are still supported. From SF user CvH
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@ -29,6 +29,7 @@ m4_ifdef([AC_USE_SYSTEM_EXTENSIONS], [AC_USE_SYSTEM_EXTENSIONS])
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AM_ICONV
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AM_ICONV
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AM_GNU_GETTEXT([external])
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AM_GNU_GETTEXT([external])
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AM_GNU_GETTEXT_VERSION(0.18)
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AM_GNU_GETTEXT_VERSION(0.18)
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AM_GNU_GETTEXT_REQUIRE_VERSION(0.18)
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# Checks for programs.
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# Checks for programs.
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AC_PROG_AWK
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AC_PROG_AWK
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