gentoo.moresecure.conf tries to drop the capability CAP_SYS_RESOURCES.
However, that capability doesn't exist, so the container doesn't start.
Change it to CAP_SYS_RESOURCE, according to capabilities(7).

Also correct the same typo in a comment in slackware.common.conf.
Signed-off-by: Karl-Johan Karlsson <creideiki@ferretporn.se>