FYI: 6 clean-up and test-related patches

[Jim Meyering]

Here are a few patches that have been languishing for too long.
No semantic change to sed itself, but the latter two do make it so
"make check" now succeeds more often for me.
Without those, sed's old version checking test would fail often
when I had local changes.

Comments welcome. I'll probably push late today or tomorrow.

0001-maint-remove-more-unnecessary-declarations.patch
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0002-maint-translate_mb-new-function-factored-out-of-y-ha.patch
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0003-maint-enable-sc_prohibit_long_lines.patch
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0004-maint-initialize-an-mbstate_t-with-0-rather-than-wit.patch
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0005-maint-COPYRIGHT_YEAR-remove-along-with-tests-that-us.patch
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0006-use-generated-version.-ch-and-add-init.sh-and-help-v.patch
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