Import new 2-clause BSD licenced implementation of the bc and dc commandsvendor/bc/3.0.2

These implementations of the bc and dc programs offer a number of advantages
compared to the current implementations in the FreeBSD base system:

- They do not depend on external large number functions (i.e. no dependency
  on OpenSSL or any other large number library)

- They implements all features found in GNU bc/dc (with the exception of
  the forking of sub-processes, which the author of this version considers
  as a security issue).

- They are significantly faster than the current code in base (more than
  2 orders of magnitude in some of my tests, e.g. for 12345^100000).

- They should be fully compatible with all features and the behavior of the
  current implementations in FreeBSD (not formally verified).

- They support POSIX message catalogs and come with localized messages in
  Chinese, Dutch, English, French, German, Japanese, Polish, Portugueze,
  and Russian.

- They offer very detailed man-pages that provide far more information than
  the current ones.

Approved by:	imp
Obtained from:	https://git.yzena.com/gavin/bc
Differential Revision:	https://reviews.freebsd.org/D19982

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/bc/power.txt b/tests/bc/power.txt
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+++ b/tests/bc/power.txt
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