This update for strongswan fixes the following issues:

A feature was added:

- Add auth_els plugin to support Marvell FC-SP encryption (jsc#SLE-20151)

Security issues fixed:

- CVE-2021-41991: Fixed an integer overflow when replacing certificates in cache. (bsc#1191435)
- CVE-2021-41990: Fixed an integer Overflow in the gmp Plugin. (bsc#1191367)