openvpn: stub compression stops working with new changes

Package Name

openvpn

Maintainer

@systemcrash

OpenWrt Version

SNAPSHOT

OpenWrt Target/Subtarget

aarch64/generic

Steps to Reproduce

1. Try to add an openvpn client config that supports compress stub-v2
2. Doesn't even accept compress option

Actual Behaviour

Previously working compression. I understand the disable of compression for security reasons, but we should have this opt-in. Also, for disabled compression builds, we should still be able to sue stub* compression methods, because they are not actually compression, but rather added frames to tell the server that you use compression. It doesn't impose any security risk and it's just nonsense to enforce the user.

See https://github.com/openwrt/packages/pull/28533#issuecomment-3994776775 for more details.

Confirmation Checklist

• The package is maintained in this repository.
• I understand that issues related to the base OpenWrt repository or LuCI repository will be closed.
• I am reporting an issue for OpenWrt, not an unsupported fork.

No file or test is named. Start by reviewing the OpenVPN package handling for the compress option and the discussion in pull request #28533; determine where stub-v2 is rejected. Done means disabled-compression builds accept the stub* methods while continuing to reject actual compression methods.