python-psycopg2: Add new package

Psycopg is the most popular PostgreSQL adapter for the Python programming language
It's used by the python-sqlalchemy for postgresql

This package was removed by this commit for lacking python3 support:
c37b15e1

Version 2.8.6 used in this package now supports pyhton3

Signed-off-by: Daniel Danzberger <daniel@dd-wrt.com>
(cherry picked from commit 7cfb9a04)

lang/python/python-psycopg2/Makefile

+#
+# Copyright (C) 2016 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=python-psycopg2
+PKG_VERSION:=2.8.6
+PKG_RELEASE:=1
+
+PYPI_NAME:=psycopg2
+PKG_HASH:=fb23f6c71107c37fd667cb4ea363ddeb936b348bbd6449278eb92c189699f543
+
+PKG_MAINTAINER:=Daniel Danzberger <daniel@dd-wrt.com>
+PKG_LICENSE:=LGPL-3.0-or-later
+PKG_LICENSE_FILES:=LICENSE
+
+include ../pypi.mk
+include $(INCLUDE_DIR)/package.mk
+include ../python3-package.mk
+
+define Package/python3-psycopg2
+  SUBMENU:=Python
+  SECTION:=lang
+  CATEGORY:=Languages
+  TITLE:=PostgreSQL database adapter
+  URL:=https://www.psycopg.org/
+  DEPENDS:=+python3 +libpq
+endef
+
+define Package/python3-psycopg2/description
+ Psycopg is the most popular PostgreSQL adapter for the Python programming language
+endef
+
+$(eval $(call Py3Package,python3-psycopg2))
+$(eval $(call BuildPackage,python3-psycopg2))
+