contrib/bc: update to version 6.2.2

This is a squashed commit that updates bc from version 5.2.2 to
version 6.2.2:

contrib/bc: update to version 5.2.3

This version fixes a parse error when passing a file to bc using -f
if that file has a multiline comment or string in it.

Merge commit '3673adf1ee311d6f83176d3e43cf0efb314764e4'

(cherry picked from commit 23210c9f42af94dc6bcdae3996d8a3d010dd6bfe)

contrib/bc: include assert.h when building with C11 or newer

This chunk should have been committed with the MFV commit
23210c9f42af94dc but was missing for an unknown reasn.

(cherry picked from commit b66d67d97aa58d0f239056917bbdbab26f41446a)

contrib/bc: import version 5.2.4

This update fixes an issue in input line editing: when going left to
the start of the line, the cursor would jump to the end of the line
instead.

Merge commit 'bc75dcc4ce682562390fa32e7cd63c08160e21b9'

(cherry picked from commit b85b9c88eb02298ea7fa3885619f54ac0e930ba4)

vendor/bc: import of version 5.2.5

This is a production release that fixes this bc's behavior on ^D to
match GNU bc.

(cherry picked from commit ed0603704174b01c25b49efc08c82e1532dc5622)
(cherry picked from commit f4ff1c300ef4081696bdd6ad34547be9242e419c)

usr.bin/bc: update to version 5.3.1

This version adds support for command line editing and history using
the libedit or readline libraries in addition to the line editing
features available in previous versions.

The version in the base system is configured to use libedit.

This allows to choose between emacs and vi line editing commands and
to use command overrides via a ~/.editrc file.

Merge commit 'bd54318046bfee055b140705a5cfd4148e78da07'

(cherry picked from commit 78bc019d220e05abb5b12f678f9b4a847019bbcc)

contrib/bc: merge from vendor release 5.3.3

This update fixes a build issue of release 5.3.2 on the FreeBSD base
system.

Merge commit '3f739b0595b7d6ac4bac9aaa1cae0910f11f92e2'

(cherry picked from commit f53b5fe7865f4e4240e40ba0f6345f81d337a823)

vendor/bc: update to upstream commit ca53adf83b7a

The filter_text function in scripts/functions.sh in version 5.3.3 had
commented out a "rm" command, probably for debugging purposes. This
caused temporary files to persist in /tmp when the bc program had been
built.

This commit fixes the build process with no change of the resulting
artefacts.

(cherry picked from commit 1576f66712876ee8b0fcc8b35fb062e1813b4fc0)
(cherry picked from commit f6ed05f1233043eb30a7e5a1efcb7247ad2add90)

contrib/bc: merge from vendor release 6.2.2

This update fixes a few issues in history editing and the processing
of the "quit" function. The "quit" function will no longer cause bc
to exit when encountered in a script file (before any command from
the script has been executed).

New functions is_number(), is_string return 1 if the passed argument
is a number resp. a string. The asciify() function has been extended
to support the conversion of an array of numbers into a string.

Merge commit '1a63323d17fedb05b6962853e821c9d7c6b9853e'

(cherry picked from commit d101cdd6edd782f6ec56eef63ed91abd77a8b317)