admin: Introduce some public constants related to server's client limits
admin: Introduce some public constants related to server's client limits

In order for typed params validation to pass on daemon side, we should
encourage users to use our exported constants with typed params to diminish
to avoid any potential problems related to argument validity.

Signed-off-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

datto/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,crobinso/libvirt,olafhering/libvirt,andreabolognani/libvirt,taget/libvirt,taget/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,crobinso/libvirt,andreabolognani/libvirt,nertpinx/libvirt,zippy2/libvirt,eskultety/libvirt,libvirt/libvirt,eskultety/libvirt,eskultety/libvirt,crobinso/libvirt,olafhering/libvirt,VenkatDatta/libvirt,libvirt/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,jardasgit/libvirt,olafhering/libvirt,zippy2/libvirt,jfehlig/libvirt,jardasgit/libvirt,taget/libvirt,datto/libvirt,datto/libvirt,andreabolognani/libvirt,eskultety/libvirt,zippy2/libvirt,eskultety/libvirt,datto/libvirt,nertpinx/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,jfehlig/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,libvirt/libvirt,andreabolognani/libvirt,nertpinx/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,taget/libvirt,datto/libvirt,olafhering/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,libvirt/libvirt,jardasgit/libvirt,taget/libvirt,crobinso/libvirt