There's a merged pull request on the void-packages repository

mbuffer: update to 20211018
https://github.com/void-linux/void-packages/pull/33627

Description:
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#### General
- [ ] This is a new package and it conforms to the [quality requirements](https://github.com/void-linux/void-packages/blob/master/Manual.md#quality-requirements)

#### Have the results of the proposed changes been tested?
- [X] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
- [ ] I generally don't use the affected packages but briefly tested this PR

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CHANGELOG:

20211018:
- fixes related to TCP timeout handling
- enhancement: support setting config file via env var MBUFFERRC
- documentation update

20211004:
- make TCPTimeout=0 disable the TCP timeout
- changed default TCP timeout from 10s to 100s
- TCP timeout now can be give with suffixes ms,s,min,h
- documented option for TCP timeout