New comment by Duncaen on void-packages repository

https://github.com/void-linux/void-packages/pull/19386#issuecomment-592453465

Comment:
We could use this if we don't want to break compatibility for now.

But I think in general it is good to have the option to choose a better compression for specific (large packages), maybe even extend it to allow patterns for packages that need better compression.

I think there are a few candidates where where we could optimize for size instead of speed:

```
0ad-data-0.0.23b_1: 1996MB (https://alpha.de.repo.voidlinux.org/current)
linux3.18-dbg-3.18.124_1: 2207MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux3.16-dbg-3.16.82_1: 2250MB (https://alpha.de.repo.voidlinux.org/current/debug)
flightgear-data-2019.1.1_1: 2504MB (https://alpha.de.repo.voidlinux.org/current)
linux4.4-dbg-4.4.213_1: 2579MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux4.9-dbg-4.9.213_1: 3127MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux4.14-dbg-4.14.170_1: 3411MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux4.19-dbg-4.19.106_1: 3644MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux5.2-dbg-5.2.21_1: 3833MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux5.3-dbg-5.3.18_1: 3968MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux5.4-dbg-5.4.22_1: 4006MB (https://alpha.de.repo.voidlinux.org/current/debug)
linux5.5-dbg-5.5.6_2: 4114MB (https://alpha.de.repo.voidlinux.org/current/debug)
kicad-packages3D-5.1.5_1: 4992MB (https://alpha.de.repo.voidlinux.org/current)
```