Hosts Lookup API

The hosts lookup enables plugins to ask Traffic Server to do a host lookup of a host name, much like a DNS lookup.

The hosts lookup functions are as follows:

• `TSHostLookup <http://people.apache.org/~amc/ats/doc/html/InkAPI_8cc.html#ab5bf6eea0ed883e5dc69253965935d12>`__
• `TSHostLookupResultAddrGet <http://people.apache.org/~amc/ats/doc/html/ts_8h.html#aecac0767192746af1867f528e01d167b>`__