Currently the icinga2 ebuild does not allow building with libressl, and requires specifically openssl be present on the system in order to compile the package. As libressl is almost a complete drop in replacement for openssl, we should allow it as an alternative. I have manually modified my local icinga2-2.4.10-r1.ebuild to allow libressl instead of openssl and can confirm that icinga2 builds and runs successfully. Aside from the ebuild file modification, no other patches were required. As per https://wiki.gentoo.org/wiki/Project:LibreSSL can the ebuild please be modified to accept libressl in place of openssl?
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