Support excluding entries from lists

[cgzones]

Currently SELlint warns on

interface(`domain_getattr_confined_domains',`
        gen_require(`
                attribute domain, unconfined_domain_type;
        ')

        allow $1 { domain -unconfined_domain_type }:process getattr;
')

with Attribute unconfined_domain_type is listed in require block but not used in interface (W-003)

p.s.: you might want to add a check for uthash in the configure script

AC_CHECK_HEADER([uthash.h], [], [AC_MSG_ERROR([Unable to find uthash header])])

[dburgener]

Fixed in 8dc1fa3 and ad16e6d

Thanks for the report!