add some jdbc-postgresql stuff from a pr

dev-java/jdbc-postgresql/Manifest

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+DIST postgresql-jdbc-42.7.0.src.tar.gz 994637 BLAKE2B 1700acf42ee2d36a9b9953a670cb5ba3874885c992f3f1ef438b409ea86f7ee52cc8db20b1cbcdb00bf79b199b38e06a932445532d7f4dba0d91649850a4bb58 SHA512 8b266e9af2ffcd680d4b7d0a92fe2083c4f4630109d887ee53a21fc7f616dcf352909ce83a984bc5c3433966eb148eace4635be2d5bc283f0e72059451c5dd96

dev-java/jdbc-postgresql/jdbc-postgresql-42.7.0.ebuild

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+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+JAVA_PKG_IUSE="doc source test"
+MAVEN_ID="org.postgresql:postgresql:${PV}"
+JAVA_TESTING_FRAMEWORKS="junit-4"
+
+inherit java-pkg-2 java-pkg-simple
+
+DESCRIPTION="Java JDBC 4.2 (JRE 8+) driver for PostgreSQL database"
+HOMEPAGE="https://jdbc.postgresql.org/"
+SRC_URI="https://jdbc.postgresql.org/download/postgresql-jdbc-${PV}.src.tar.gz"
+S="${WORKDIR}/postgresql-${PV}-jdbc-src"
+
+LICENSE="BSD-2"
+SLOT="0"
+KEYWORDS="~amd64"
+# package se.jiderhamn.classloader
+# package se.jiderhamn.classloader.leak
+# package uk.org.webcompere.systemstubs.environment
+# package uk.org.webcompere.systemstubs.jupiter
+# package uk.org.webcompere.systemstubs.properties
+# package uk.org.webcompere.systemstubs.resource
+RESTRICT="test" #839681
+
+DEPEND="
+	dev-java/checker-framework-qual:0
+	dev-java/jna:4
+	dev-java/osgi-cmpn:8
+	dev-java/osgi-core:0
+	dev-java/scram:0
+	dev-java/waffle-jna:0
+	>=virtual/jdk-1.8:*
+	test? ( dev-java/junit:5 )
+"
+
+RDEPEND=">=virtual/jre-1.8:*"
+
+JAVA_CLASSPATH_EXTRA="
+	checker-framework-qual
+	jna-4
+	osgi-cmpn-8
+	osgi-core
+	scram
+	waffle-jna
+"
+JAVA_AUTOMATIC_MODULE_NAME="org.postgresql.jdbc"
+JAVA_MAIN_CLASS="org.postgresql.util.PGJDBCMain"
+JAVA_RESOURCE_DIRS="src/main/resources"
+JAVA_SRC_DIR="src/main/java"
+JAVA_TEST_GENTOO_CLASSPATH="
+	junit-4
+	junit-5
+"
+JAVA_TEST_RESOURCE_DIRS="src/test/resources"
+JAVA_TEST_SRC_DIR="src/test/java"

dev-java/jdbc-postgresql/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>java@gentoo.org</email>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">pgjdbc/pgjdbc</remote-id>
+	</upstream>
+</pkgmetadata>