Log message:
Instead of including bsd.pkg.install.mk directly in a package Makefile,
have it be automatically included by bsd.pkg.mk if USE_PKGINSTALL is set
to "YES".  This enforces the requirement that bsd.pkg.install.mk be
included at the end of a package Makefile.  Idea suggested by Julio M.
Merino Vidal <jmmv at menta.net>.

Log message:
Take maintainership

Log message:
Update of mail/nail to 10.4. Changes since 10.3 (as per e-mail
from Gunnar Ritter):

* A missing #ifdef HAVE_ICONV caused build errors on platforms without
  iconv() support (J.A. Neitzel, Jens Schleusener, Lars Kellogg-Stedman,
  Felicia Neff, Chris Pinnock).
* Extraction of parts from header fields with more than 2560 characters
  fixed (Lukasz Sznuk, William Cherry).
* Source archive name in nail.spec corrected (Didar Hussain).
* Fixed segmentation violation when encountering multipart header fields
  that contain no ':' character (William Cherry).
* Respect the 'allnet' variable when comparing strings in message lists.
* IPv6 support (Jun-ichiro itojun Hagino).

Log message:
Initial import of nail 10.3 into the NetBSD packages collection as
mail/nail. 

Nail is a mail user agent derived from Berkeley Mail 8.1. It is
intended to provide the functionality of the POSIX.2 mailx command
with built-in support for MIME messages. This means it can handle
international character sets as well as attachments. In recent
system environments, nail is Unicode/UTF-8 capable. It further
contains some minor enhancements like the ability to set a "From:"
Address.

Supplied (for nail 10.1) by Mishka in PR#19112. Thanks!