Making embedded examples more consistent.

+ appearance (similar syntax on all examples)
+ declarations (if a variable is used, use it consistently across all of
  the examples)
+ line wrap at 80 columns (so that examples make sense when copy/pasted
  around for discussion. like github)
+ updating javadoc comments to be consistent
Merge branch 'jetty-9.2.x'

Conflicts:
	examples/embedded/src/main/java/org/eclipse/jetty/embedded/ManyConnectors.java
	examples/embedded/src/main/java/org/eclipse/jetty/embedded/SpdyConnector.java