Drop native libraries for browser control and use JNA

This reduces the amount of native code that needs to be shipped with
NetBeans and allows to support running on more platforms.

The DDE based control was completely removed as in tests MS Edge,
Google Chrome and Mozilla Firefox all did not support DDE.

Closes: #8218

ide/extbrowser/build.xml

@@ -23,43 +23,4 @@
 
     <import file="../../nbbuild/templates/projectized.xml"/>
 
-    <target name="jnlp" depends="netbeans,-jnlp-init">
-        <property name="dir" location="${jnlp.dest.dir}/${code.name.base.dashes}"/>
-        <mkdir dir="${dir}"/>
-        <copy file="${cluster}/${module.jar}" todir="${dir}"/>
-        <nb-ext-jar jarfile="${dir}/windows.jar">
-            <fileset dir="${cluster}/modules/lib">
-                <include name="extbrowser*.dll"/>
-            </fileset>
-        </nb-ext-jar>
-        <!-- XXX ought to only do this in case jnlp.sign.jars=true -->
-        <signjar alias="${jnlp.signjar.alias}" storepass="${jnlp.signjar.password}" keystore="${jnlp.signjar.keystore}">
-            <fileset dir="${dir}">
-                <include name="*.jar"/>
-            </fileset>
-        </signjar>
-        <property file="${manifest.mf}"/>
-        <property file="${src.dir}/${OpenIDE-Module-Localizing-Bundle}"/>
-        <echo file="${jnlp.dest.dir}/${code.name.base.dashes}.jnlp"><![CDATA[<?xml version='1.0' encoding='UTF-8'?>
-<!DOCTYPE jnlp PUBLIC "-//Sun Microsystems, Inc//DTD JNLP Descriptor 6.0//EN" "http://java.sun.com/dtd/JNLP-6.0.dtd">
-<jnlp spec='1.0+' codebase='${jnlp.codebase}'>
-  <information>
-   <title>${OpenIDE-Module-Name}</title>
-   <vendor>NetBeans</vendor>
-   <description kind='one-line'>${OpenIDE-Module-Short-Description}</description>
-   <description kind='short'>${OpenIDE-Module-Long-Description}</description>
-  </information>
-  <security><all-permissions/></security>
-  <resources>
-    <jar href='${code.name.base.dashes}/${code.name.base.dashes}.jar'/>
-  </resources>
-  <resources os="Windows">
-    <nativelib href='${code.name.base.dashes}/windows.jar'/>
-  </resources>
-  <component-desc/>
-</jnlp>
-            ]]>
-        </echo>
-    </target>
-
 </project>