- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFV r249496,249498. The most visible change is that we no longer shuts
down the connection when stdin closes, by default. This matches Hobbit's
original netcat and GNU netcat.

Old behavior can be restored with the new -N flag.

MFC after: 2 weeks

MFV: nc(1) from OpenBSD 4.9.

MFC after: 1 month
Obtained from: OpenBSD

Merge nc(1) from OpenBSD 4.4. While there, rename our '-O' (no
tcp options) to '--no-tcpopt' in order to resolve a comflicit
with OpenBSD's -O semantics.

This commit was generated by cvs2svn to compensate for changes in r178382,
which included commits to RCS files with non-trunk default branches.

Import netcat as of today's OPENBSD_4_3 snapshot.

Import netcat from OpenBSD 3.9-RELEASE.

Import a (stripped) snapshot of OpenBSD's nc(1) an excellent
reimplementation of the famous tool that can do arbitrary TCP
and UDP connections and listens.

This gaves sysadm the same tool the crackers have, so that
they may learn what the network is about and protect it better.
For developers, this is an invaluable debugging tool, and a
good build block of scripts.

Discussed on: freebsd-hackers@