regen v9_11
4456. [doc] Add DOCTYPE and lang attribute to <html> tags. [RT #42587] (cherry picked from commit 63fe88e8d8b1f48cf632628e4e2e3a413f9bac6e)
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update copyright notice
2571. [func] Add a new tool "arpaname" which translates IP addresses to the corresponding IN-ADDR.ARPA or IP6.ARPA name. [RT #18976]