RFR: 8061842: Package jurisdiction policy files as something other than JAR

[Bradford Wetmore]

https://bugs.openjdk.java.net/browse/JDK-8061842
http://cr.openjdk.java.net/~wetmore/8061842/webrev.00/

The proposal is to move the configuration files from the jar files in 
<java-home>/lib/security to a series of subdirectories under a new 
"policy" subdirectory in <java-home>/conf/security.  Each subdirectory 
within that directory will represent a complete policy configuration. 
The existing jar files will be split into flat text files such that the 
current/existing policies remain.

The default set of policy files (i.e. directory) is configured using a 
new java.security.Security property called "crypto.policy" which will be 
added to the <java-home>/conf/security/java.security file.  The default 
initial options are "limited" or "unlimited", however additional 
directories could potentially be created that specify other 
as-yet-unknown policies.

The default value of this property will be "limited" which corresponds 
to our current policy for JRE/JDK export/import around the world. 
However, the build respects the following "configure" option:

     --enable-unlimited-crypto
                         Enable unlimited crypto policy [disabled]

Within the directory, our implementation will look for files using the 
standard filename prefix above ("default_" or "exempt_"), thus new 
additional policy restrictions/abstractions can be added with a simple 
file addition.

Brad