Log Message:
Fix the icewm* packages on NetBSD >= 2.0 (with native iconv(3)), the
problem was that the prototype used by this was not matching the NetBSD
one, which uses ``const char **'' as its second argument, when libiconv
and POSIX uses ``char **''.

This closes PR pkg/28693.

Bumped PKGREVISION to all icewm* pkgs for the bulk builds.