DBD::Oracle DRCP_1.25

Hello,

I have noticed and installed DRCP_1.25 branch from DBD::Oracle 
repository. It seems to work fine but it's missing some essential 
functionality in order to make it usefull. So I have made local 
modifications (some of them are not essential) and all seems to work 
fine here.

What I have done:
1. essential
- added ora_pool_class connection attribute that sets 
OCI_ATTR_CONNECTION_CLASS on the obtained connection. It is essential 
because without setting this attribute the pooled sessions are not 
shared between processes. From oracle documentation:

 > If no connection class is specified, the OCISessionPool’s name is 
implicitly used
 > as the connection class by all the requests using that 
OCISessionPool, resulting in
 > sharing only within a session pool, becoming equivalent to a plain 
client-side
 > session pooling application.

2.non-essential
- Added ora_pool_min, ora_pool_max, ora_pool_incr connections attributes 
that are used to set corresponding values for OCISessionPoolCreate.
- Set default values for the above parameters to follow default values 
of DBMS_CONNECTION_POOL package (principle of least surprise)

I have some questions:
1. Do you have suggestions for different names of attributes? I was 
considering ora_drcp_class etc. but I am not sure what will be the best.
2. If my work is interesting for the further development of DBD::Oracle, 
whom I should send a patch?

Finally, if this work is accepted I will add proper documentation for 
the new attributes.

Best regards
luben karavelov