Hi,

I have added a new API "TSUrlRemoveHostName()" to InkAPI.cc to remove host name 
from the GET send to next tier. Refer TS-4724 & PR-859 for more information.

Create a new lua API "ts.server_request.remove_host_name_from_url()" to remove 
host name from the GET request to next tier. This helps to have a parent 
remap.config entry similar to child cache. This makes provisioning more 
meaningful and easy at both parent and child.

With this fix, the GET request to parent will change..

from:

+++++++++ Proxy's Request +++++++++
- State Machine Id: 5593
GET http://origin.com/dir1/a.txt HTTP/1.1^M
User-Agent: curl/7.29.0^M
Host: abc.com^M
Accept: /^M
Client-ip: 135.xx.xx.xx^M
X-Forwarded-For: 135.xx.xx.xx^M

To:
+++++++++ Proxy's Request +++++++++
- State Machine Id: 5593
GET /dir1/a.txt HTTP/1.1^M
User-Agent: curl/7.29.0^M
Host: abc.com^M
Accept: /^M
Client-ip: 135.xx.xx.xx^M
X-Forwarded-For: 135.xx.xx.xx^M

This will enable to have parent and child's remap.config entries as below:

map http://abc.com<http://abc.com/> http://origin.com<http://origin.com/> 
@plugin=tslua.so @pparam=/opt/trafficserver/etc/trafficserver/lua/test.lua
Please provide your comments.

Regards,
Kishore

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