lambdaman: do not exhaust closed file descriptors

Avoid lazy IO when reading manifests.

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
metadata/layout.conf: deprecate all EAPIs lower, than 5

As we use subslots extensively we should push our users
heavier to update ebuilds up to EAPI=5.

https://blogs.gentoo.org/johu/2013/07/01/deprecating-and-banning-old-eapis/

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
profiles/categories: added categories spotted by repoman

GONE CATEGORY: gnome-extra
NEW  CATEGORY: www-servers
NEW  CATEGORY: app-misc
NEW  CATEGORY: net-misc

helps egencache not to skip those dirs when generating metadata.

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>