Support for InfluxQL

[Rafael-Etaplus]

Proposal:
According to this document. The influxdb still supports the influx Query Language (QL).

Current behavior:
Currently using a query which has QL syntax ends with error:
error @1:1-1:7: undefined identifier select

Desired behavior:
There is a way to run influx Query Language with this client. If this is not supported, it should be written explicitly in the documentation that this feature is not supported.

Alternatives considered:

• Rewriting all the QL-queries into flux which cause additional effort
• Writing own client to support the Query Language

Use case:
Existing application used in production was implemented using Query Language syntax. After upgrading the database from version 1.x to the newest 2.x it is not possible to use the client with queries written in Query Language