These are the packages that would be merged, in order:

Calculating world dependencies . … done!
[ebuild U ] sys-apps/man-pages-2.70 [2.69] USE=”nls” 1,814 kB
[ebuild U ] dev-libs/libxml2-2.6.30-r1 [2.6.30] USE=”python readline -debug -doc -ipv6 -test” 0 kB
[ebuild N ] app-admin/webapp-config-1.50.16-r1 102 kB
[ebuild U ] sys-power/apcupsd-3.12.4 [3.10.18-r1] USE=”ncurses nls usb -cgi -doc -snmp -threads -vhosts% (-apache2%)” 4,125 kB

Total: 4 packages (3 upgrades, 1 new), Size of downloads: 6,040 kB