all: remove explicit versions in USES=python for "3.x+"

The logic in USES=python will automatically convert this to 3.8+ by
itself.

Adjust two ports that only had Python 3.7 mentioned but build fine
on Python 3.8 too.

finance/quickfix: mark BROKEN with PYTHON

libtool: compile:  c++ -DHAVE_CONFIG_H -I. -I../.. -I -I. -I.. -I../.. -I../C++
-DLIBICONV_PLUG -DPYTHON_MAJOR_VERSION=3 -Wno-unused-variable
-Wno-maybe-uninitialized -O2 -pipe -DLIBICONV_PLUG -fstack-protector-strong
-fno-strict-aliasing -DLIBICONV_PLUG -Wall -ansi
-Wno-unused-command-line-argument -Wpointer-arith -Wwrite-strings
-Wno-overloaded-virtual -Wno-deprecated-declarations -Wno-deprecated -std=c++0x
-MT _quickfix_la-QuickfixPython.lo -MD -MP -MF
.deps/_quickfix_la-QuickfixPython.Tpo -c QuickfixPython.cpp  -fPIC -DPIC -o
.libs/_quickfix_la-QuickfixPython.o
warning: unknown warning option '-Wno-maybe-uninitialized'; did you mean
'-Wno-uninitialized'? [-Wunknown-warning-option]
QuickfixPython.cpp:175:11: fatal error: 'Python.h' file not found
          ^~~~~~~~~~
1 warning and 1 error generated.

Reviewed by:	portmgr, vishwin, yuri
Differential Revision:	<https://reviews.freebsd.org/D40568>

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

math/bcal: Update to 2.4

Changes:	https://github.com/jarun/bcal/releases/tag/v2.4

math/bcal: Add a missing patch and depend on math/calc

These changes should be a part of the previous commit.

math/bcal: Update to 2.3

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

math/bcal: enable on powerpc64le

math/bcal: enable on powerpc64

MFH:		2020Q1

Update to 2.2

While here:
- Keep MANDIR standard
- Lint the file with portfmt

Reported by:	Repology

math/bcal: Honor CFLAGS

Set CFLAGS_OPTIMIZATION to nothing in order to override default
optimizations.

Update devel/readline to 8.0

- Bump PORTREVISION of dependent ports for shlib change

Changes:	https://tiswww.case.edu/php/chet/readline/CHANGES
PR:		236156
Exp-run by:	antoine

New port: math/bcal: Storage expression, unit conversion & address offset CLI
calculator

bcal (Byte CALculator) is a REPL CLI utility for storage expressions, unit
conversions or address calculations. If you can't calculate the hex address
offset for (512 - 16) MiB, or the value when the 43rd bit of a 64-bit
address is set mentally, bcal is for you.

It has a bc mode for general-purpose numerical calculations.

bcal follows Ubuntu's standard unit conversion and notation policy. Only
64-bit operating systems are supported.

Features:

- evaluate arithmetic expressions involving storage units