UnkownHostException on S3

[obsd-guru]

template is bold
sample data is italicized

Issue Description: Dynmap sample issue description. This description would include as much and as little detail necessary for us to understand the issue in its entirety.

When i try to use Dynmap on S3 storage i always get UnkownHostException
exact the same credentials let me connect with s3cmd for example without any problems on the same host

• Dynmap Version: v3.7-SNAPSHOT-948

• Server Version: git-Paper-196

• Pastebin of Configuration.txt: https://pastebin.com/bJJj9H7h

• Pastebin of crashlogs or other relevant logs: https://pastebin.com/V0JzUfn7

[x] I have looked at all other issues and this is not a duplicate
[x] I have been able to replicate this