Update troubleshooting.adoc

Fixed broken new lines.
Fixed broken link to the discussion on freezing on startup.
Fixed broken link to old issues on google.

src/docs/asciidoc/sdk/troubleshooting.adoc

@@ -92,8 +92,10 @@ When an exception happens in the SDK, a small warning sign appears in the lower
 
 You can install another JDK for use with the jMonkey SDK. You then have to specify the location manually.
 
-.  Go to your jMonkeyEngine SDK installation directory. +Mac users right-click jMonkeyApplication.app (which actually is a directory) in the Finder and select “Show package contents. 
-.  Navigate to the `etc` directory. +Mac users navigate to `Contents/Resources/jmonkeyplatform/etc/`.
+.  Go to your jMonkeyEngine SDK installation directory. +
+Mac users right-click jMonkeyApplication.app (which actually is a directory) in the Finder and select “Show package contents. 
+.  Navigate to the `etc` directory. +
+Mac users navigate to `Contents/Resources/jmonkeyplatform/etc/`.
 .  Open the file `jmonkeyplatform.conf` in a text editor.
 .  Change the following line and enter the path to the JDK: 
 [source]
@@ -114,12 +116,12 @@ If you're behind a proxy or special network settings, try :
 4. setup “manual proxy settings” (for some reason the “Use System Proxy Settings” option doesn't work on some Linux distributions)
 ....
 
-link:http://hub.jmonkeyengine.org/forum/topic/jme-sdk-stalls-on-startup/[discussion]
+link:https://hub.jmonkeyengine.org/t/jme-sdk-stalls-on-startup/30555/20[Discussion] of the problem.
 
 
 === Known Issues
 
-For a list of known issues and possible workarounds see the following link: link:https://github.com/jMonkeyEngine/sdk/issues[List of known issues on github]
+For a list of known issues and possible workarounds see the following link: link:https://github.com/jMonkeyEngine/sdk/issues[List of known issues on github.]
 
-Some issue are imported from the previous googlecode
-link:http://code.google.com/p/jmonkeyengine/issues/list?can=2&q=label%3AProduct-Platform+Type%3DDefect+&colspec=ID+Type+Status+Component+Priority+Product+Milestone+Owner+Summary&cells=tiles[List of old issues on googlecode]
+Some issue are imported from the previous googlecode: 
+link:https://code.google.com/archive/p/jmonkeyengine/issues[List of old issues on googlecode.]