Catch all exceptions in jansi initialization. Fixes BUKKIT-4936

Both log4j and our own jline/jansi initialization attempt to catch
errors caused by jansi's use of native libraries. However both of them use
the Exception type which does not catch all errors. On Windows Server 2008
R2 Enterprise without installing extra software the required C++ libraries
are not available which causes an error that does not extend Exception. To
ensure we catch all errors I've changed both of these to catch Throwable
instead which gets us a working console minus jansi functionality.

src/main/java/net/minecraft/server/MinecraftServer.java

@@ -116,7 +116,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         try {
             this.reader = new ConsoleReader(System.in, System.out);
             this.reader.setExpandEvents(false); // Avoid parsing exceptions for uncommonly used event designators
-        } catch (Exception e) {
+        } catch (Throwable e) {
             try {
                 // Try again with jline disabled for Windows users without C++ 2008 Redistributable
                 System.setProperty("jline.terminal", "jline.UnsupportedTerminal");

src/main/java/org/apache/logging/log4j/core/appender/ConsoleAppender.java

@@ -130,7 +130,7 @@ public final class ConsoleAppender extends AbstractOutputStreamAppender {
             LOGGER.debug("Jansi is not installed, cannot find {}", JANSI_CLASS);
         } catch (final NoSuchMethodException nsme) {
             LOGGER.warn("{} is missing the proper constructor", JANSI_CLASS);
-        } catch (final Exception ex) {
+        } catch (final Throwable ex) { // CraftBukkit - Exception -> Throwable
             LOGGER.warn("Unable to instantiate {}", JANSI_CLASS);
         }
         return printStream;