Use ${} instead of $() in various makefilesAlso use ${.TARGET} and ${.ALLSRC] wherever impossible.Minor style adjustment in at(1)'s makefiles.
share/doc: Remove documents that we haven't been installing for ages.While all of those are old and some of them are quite outdated, someothers are actually still useful and have information that
share/doc: Remove documents that we haven't been installing for ages.While all of those are old and some of them are quite outdated, someothers are actually still useful and have information that is notcontained in any manual page (such as information on the internalsof config(8), for example). But since we haven't been installing themsince 15 years now (see ce233c472eb2cc66b348daa45965ffeb85ad7fe1) andthey are archived elsewhere and easily findable on the web, removethem from our tree.Also, they would need groff in base to build, which is no longer thecase in DragonFly since 1419a4e1759b9901ee3a1d147d0f7bee0394d6f3.See for example https://docs.freebsd.org/44doc/ for FreeBSD'sarchive.
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Fix several speelling errorsReviewed by: swildner, zrj
Sweep-fix comparing pointers with 0 (and assigning 0 to pointers).For better readability, don't compare pointers with 0 or assign 0to them. Use NULL instead.The change was done with coccinelle.
Interbench -- Do not compare strings with ==.
interbench - Port to DragonFly
interbench - initial import