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

Put them with the others ncurses libs.

Sponsored by:	Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D38227

A few shared libraries in the base system link against ncurses.  An
upgrade from a 12.x host to 13 results in ABI breakage for existing
binaries since the newer versions of these libraries link against the
newer ncurses while the binary itself links against the older ncurses.
For example, dialog4ports built on 12.x sometimes crashes on 13 since
it depends on libdialog which links against ncurses internally.

MFC after:	3 days
Reviewed by:	kib, delphij
Differential Revision:	https://reviews.freebsd.org/D28448

Only keep the widechar version of ncurses as libncursesw.so.9

Keep the old name to avoid breaking the ABI compatibility (the non
widechar version libncurses.so.9 is not binary compatible with
libncursesw.so.9) since all ports and base are already only linking
against the widechar version we can simply remove libncurses.so.9

Since the .9 version only lived in the dev branch and never ended in a
release, it is simply removed and not added to any binary compat
package.

Add symlinks to keep build time compatibility for anyone linking against
-lncurses

Sponsored by:	Dell EMC Isilon

This implifies pathing in make/displayed output

MFC after:    3 weeks
Sponsored by: Dell EMC Isilon

These are no longer needed after the recent 'beforebuild: depend' changes
and hooking DIRDEPS_BUILD into a subset of FAST_DEPEND which supports
skipping 'make depend'.

Sponsored by:	EMC / Isilon Storage Division

This both avoids some dependencies on xinstall.host and allows
bootstrapping on older releases to work due to lack of at least 'install -l'
support.

Sponsored by:	EMC / Isilon Storage Division