sysutils/linux-miniconda-installer: Add ONLY_FOR_ARCHS_REASON

Also bump auto-admin dep version to ensure latest bug fixes

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.

sysutils/linux-miniconda-installer: 3.8 is still the default python

sysutils/linux-miniconda-installer: Bump python dep to 3.9

Miniconda has specific python requirements updated periodically

PR:             261871
Reported by:    thierry

sysutils/linux-miniconda-installer: Aid for installing and using miniconda

Conda, like pip and CRAN, is a popular system that allows non-root users to
install many binary software packages in their own directories.  The system
includes a base "channel" (repository) as well as 3rd party community
channels, such as "bioconda".  QC for community channels is generally below
that of the base channel and FreeBSD ports, but they provide users with a
convenient way to install software not yet available in FreeBSD ports.

Packages are available for Linux, MacOS, and Windows.  Linux Conda packages
work about as well on FreeBSD as they do on CentOS, which is the basis of
FreeBSD's Linux compatibility tool set.  However, Conda and its packages
require a complete Linux environment for full functionality.

Typical Conda users do not know how to configure this environment on FreeBSD.
Miniconda-installer ensures a proper environment for installing and using
Miniconda and the packages it provides.