Update to r40822:

• fixes missing &os; entities
• fixes most redundancy--this required general rewording and tightening
• more general tightening and rewording to remove most instances of "you"
• a few title fixes
• imake section was removed as this is a ports maintainer issue which should not be an end-user problem
• reword incorrect usage of pkg_install (this comes with pkgng, not traditional system)

Reviewed by: bcr