[FS#493] strongSwan no known IPsec stack detected since switch to kernel 4.9

[LEDE Bugs]

The following task has a new comment added:

FS#493 - strongSwan no known IPsec stack detected since switch to kernel 4.9
User who did this - Felix Fietkau (nbd)

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Please try the latest version from my staging tree at
https://git.lede-project.org/?p=lede/nbd/staging.git;a=summary
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=493#comment1917