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

Calculating dependencies ... done!
Dependency resolution took 1.06 s (backtrack: 0/20).

[ebuild  N     ] net-libs/udns-0.6::gentoo  USE="ipv6 tools" 84 KiB
[ebuild  N     ] acct-group/sniproxy-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-libs/libev-4.33::gentoo  USE="-static-libs" 557 KiB
[ebuild  N     ] acct-user/sniproxy-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-libs/libpcre-8.45-r4:3::gentoo  USE="bzip2 cxx jit pcre16 readline (unicode) zlib -libedit -pcre32 -static-libs -valgrind" 1542 KiB
[ebuild  N     ] www-servers/sniproxy-0.6.1::gentoo  USE="dns largefile -rfc3339 -test" 78 KiB

Total: 6 packages (6 new), Size of downloads: 2259 KiB