lopsub.7: Add NAME section.

lopsub.7: Add NAME section.

Lintian complains about this because the NAME sections of all man
pages are parsed to generate the index for apropos(1) and co.

	Each manual page should start with a "NAME" section, which lists the
	name and a brief description of the page separated by "\-". The "NAME"
	section is parsed by lexgrog and used to generate a database that's
	queried by commands like apropos and whatis. This tag indicates that
	lexgrog was unable to parse the NAME section of this manual page.