Properly document PKCS7_final(3), which was already mentioned
in passing in some other manual pages.

delete references to ERR pages from SEE ALSO where such
references were already given below RETURN VALUES right above

Tree structure for manual pages: crypto(3) links to 33 function
group pages, and these link on to all their second-level subpages.
Only a handful of second-level pages have third-level subpages.
So a

Tree structure for manual pages: crypto(3) links to 33 function
group pages, and these link on to all their second-level subpages.
Only a handful of second-level pages have third-level subpages.
So all crypto pages can now be reached from the www.libressl.org
frontpage via at most four clicks, in most cases three clicks.
Also link back from leaf pages to their respective group pages
and add a couple of additional links between related pages.
Triggered by a question from deraadt@.
OK jmc@ tb@

show more ...

finish crypto HISTORY; mostly 1.1.0/6.3, but also various other fixes

crypto HISTORY up to 0.9.5; researched from OpenSSL git

change two trailing Xr to Fn; ok schwarze

tweak SEE ALSO; in particular,
make sure that all PKCS7 pages point to PKCS7_new(3)

Copyright and license

various cleanup; leaving dangling PKCS7* Xr for now...

first pass; ok schwarze

convert PEM and PKCS manuals from pod to mdoc