Fix .Xr order. From mandoc -Tlint.

Install the new page SSL_set1_host(3), link to it from relevant places,
and add two other .Xrs that might help readers find their way.
Update the merge notices of all files touched and
merge a few tr

Install the new page SSL_set1_host(3), link to it from relevant places,
and add two other .Xrs that might help readers find their way.
Update the merge notices of all files touched and
merge a few trivial changes from the OpenSSL 1.1.1 branch.
OK tb@

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found a complete archive of SSLeay-0.4 to SSLeay-0.8.1b tarballs
on the web, so fix up SSLeay HISTORY accordingly

ssl.h HISTORY up to SSLeay 0.8.1b; researched from OpenSSL git

Copyright and license

move manual pages from doc/ to man/ for consistency with other
libraries, in particular considering that there are unrelated
files in doc/; requested by jsing@ and beck@