Restore IPsec ESP modules

WenChao Zhangrequested to merge
wenchao/kde-linux:revert-dirtyfrag-mitigation into master

Dirty Frag has been fixed upstream: xfrm-ESP Page-Cache Write (CVE-2026-43284) was patched in mainline f4c50a4034e6 and RxRPC Page-Cache Write (CVE-2026-43500) was patched in mainline aa54b1d27fe0.

Reference: https://github.com/V4bel/dirtyfrag

Fixes #673

This reverts commit 486cf7bc.

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