net/py-urllib3: disable SSL by default

The [secure] extra (provided by the SSL option) is deprecated:
urllib3/urllib3#2680
...but the pyOpenSSL bit is un-deprecated:
urllib3/urllib3#3126

Given that even pyOpenSSL is regarded as an optional third-party
module, disable by default. By side effect, reduces build load,
induced by mainline py-cryptography's required Rust code, for those
ports using sphinx to build documentation, as this is part of
sphinx's dependency tree.

net/py-urllib3/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	urllib3
 PORTVERSION=	1.26.16
+PORTREVISION=	1
 PORTEPOCH=	1
 CATEGORIES=	net python
 MASTER_SITES=	PYPI \
@@ -35,7 +36,7 @@ PYTEST_IGNORED_TESTS=	test_ssl_read_timeout
 SUB_FILES=	pkg-message
 
 OPTIONS_DEFINE=	BROTLI SOCKS SSL
-OPTIONS_DEFAULT=SOCKS SSL
+OPTIONS_DEFAULT=SOCKS
 
 BROTLI_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}brotli>=1.0.9:archivers/py-brotli@${PY_FLAVOR}
 SOCKS_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pysocks>=1.5.6<2.0:net/py-pysocks@${PY_FLAVOR}