Description of problem:

The BuildRequires on fedora-usermgmt-devel and %{?FE_USERADD_REQ} was removed but %pre and %postun still make use of the macros defined in there.  This results in those macros not getting expanded at build time:

# rpm -q --scripts jetty
preinstall scriptlet (using /bin/sh):
# Add the "jetty" user and group
%__fe_groupadd 110 -r jetty &>/dev/null || :
# Use /bin/sh so init script will start properly.
%__fe_useradd  110 -r -s /bin/sh -d /usr/share/jetty -M          \
                    -g jetty jetty &>/dev/null || :


postuninstall scriptlet (using /bin/sh):
%__fe_userdel  jetty &>/dev/null || :
%__fe_groupdel jetty &>/dev/null || :


12:41:12 Installing jetty-8.1.0-1.fc17.noarch
/var/tmp/rpm-tmp.YheWdg: line 2: fg: no job control
/var/tmp/rpm-tmp.YheWdg: line 4: fg: no job control
warning: user jetty does not exist - using root
warning: group jetty does not exist - using root
warning: user jetty does not exist - using root
warning: group jetty does not exist - using root
warning: user jetty does not exist - using root
warning: group jetty does not exist - using root