Help with clarifying dynamic-linking behavior

[hallfox]

Hi there, had a quick question about the expectations of using dynamic linking. The readme in rdkafka-sys claims:

The system version of librdkafka must exactly match the version of librdkafka bundled with this crate.

However, in the build.rs appears to be searching for a version of librdkafka with *at least the version of the one bundled within itself. The commit on the readme appears to be newer, should the build.rs be updated to reflect what the readme says? Thanks.