[Wrapper-user] patch (3/4) -- don't catch signals in JNI

[Robey P. <ro...@da...>]

3rd patch of 4.  This one is a little rough.  Basically, under high  
load, catching signals inside JNI causes the JVM to crash, at least  
on Linux.  Crashing the JVM is really bad, and basically a non- 
recoverable error for any java code.

Since signals are caught by the wrapper process and passed to the JVM  
across a control channel, there is no reason for JNI code to try to  
handle signals anyway, so we just uncommented this code.  This may  
need more discussion: What is this code meant to be used for?

In general, my experience has been that the JVM tends to use signals  
for its own purposes, so trying to catch signals in the JVM is bad  
medicine.  This is especially true for things like HUP, USR1, and USR2.

robey