src/Tools/jEdit/patches/putenv

updated to jedit_build-20181025 according to patches/macos (Java 11), patches/putenv;
proper update of jEdit environment -- avoid warnings in Java 11;
activate jdk-11+28;

diff -ru 5.5.0/jEdit/org/gjt/sp/jedit/MiscUtilities.java 5.5.0/jEdit-patched/org/gjt/sp/jedit/MiscUtilities.java
--- 5.5.0/jEdit/org/gjt/sp/jedit/MiscUtilities.java	2018-04-09 01:57:06.000000000 +0200
+++ 5.5.0/jEdit-patched/org/gjt/sp/jedit/MiscUtilities.java	2018-10-25 22:06:22.258705636 +0200
@@ -126,6 +126,20 @@
 	static final Pattern winPattern = Pattern.compile(winPatternString);
 
 
+	private static Map<String,String> environ =
+		Collections.synchronizedMap(new HashMap(System.getenv()));
+
+	public static String getenv(String varName)
+	{
+		return environ.get(varName);
+	}
+
+	public static void putenv(String varName, String value)
+	{
+		environ.put(varName, value);
+	}
+	
+
 	/** A helper function for expandVariables when handling Windows paths on non-windows systems.
 	*/
 	private static String win2unix(String winPath)
@@ -135,7 +149,7 @@
 		if (m.find())
 		{
 			String varName = m.group(2);
-			String expansion = System.getenv(varName);
+			String expansion = getenv(varName);
 			if (expansion != null)
 				return m.replaceFirst(expansion);
 		}
@@ -174,7 +188,7 @@
 				return arg;
 		}
 		String varName = m.group(2);
-		String expansion = System.getenv(varName);
+		String expansion = getenv(varName);
 		if (expansion == null) {
 			if (varName.equalsIgnoreCase("jedit_settings") && jEdit.getSettingsDirectory() != null) {
 				expansion = jEdit.getSettingsDirectory();
@@ -184,7 +198,7 @@
 				varName = varName.toUpperCase();
 				String uparg = arg.toUpperCase();
 				m = p.matcher(uparg);
-				expansion = System.getenv(varName);
+				expansion = getenv(varName);
 			}
 		}
 		if (expansion != null) {