etc: remove leftover leading empty comments, blank lines

Remove leftover empty leading comments/blank lines that had been
spacers between $FreeBSD$ and the following content in config files
in src/etc.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D41548

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

etc/shells: Add a reference to the ftpd manpage

While here, also fix incorrect capitalizaiton

Move back group, master.passwd and shells to etc directory

Use the .PATH mechanism instead so keep installing them from lib/libc/gen

While here revert 347961 and 347893 which are no longer needed

Discussed with: manu
Tested by: manu
ok manu@

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

remove last empty line

Add /bin/tcsh

$Id$ -> $FreeBSD$

Add Id keywords

Initial import of 386BSD 0.1 othersrc/etc