add support for proxy authentication using auth
add support for proxy authentication using auth

ibmdb/node-ibm_db,ibmdb/node-ibm_db,qpresley/node-ibm_db,ibmdb/node-ibm_db,qpresley/node-ibm_db,qpresley/node-ibm_db,Akpotohwo/node-ibm_db,ibmdb/node-ibm_db,qpresley/node-ibm_db,ibmdb/node-ibm_db,Akpotohwo/node-ibm_db,Akpotohwo/node-ibm_db,qpresley/node-ibm_db,Akpotohwo/node-ibm_db,Akpotohwo/node-ibm_db,Akpotohwo/node-ibm_db,ibmdb/node-ibm_db,qpresley/node-ibm_db