* dirmngr/dns.c (dns_a_parse0, dns_a_push0, dns_a_cmp0): New.
(dns_a_print0, dns_aaaa_parse0, dns_aaaa_cmp0): New.
(dns_aaaa_print0, dns_mx_parse0, dns_mx_push0, dns_mx_cmp0): New.
(dns_mx_print0, dns_mx_cname0, dns_ns_parse0, dns_ns_push0): New.
(dns_ns_cmp0, dns_ns_print0, dns_ns_cname0, dns_cname_parse0): New.
(dns_cname_push0, dns_cname_cmp0, dns_cname_print0): New.
(dns_cname_cname0, dns_soa_parse0, dns_soa_push0): New.
(dns_soa_cmp0, dns_soa_print0, dns_srv_parse0, dns_srv_push0): New.
(dns_srv_cmp0, dns_srv_print0, dns_srv_cname0, dns_opt_parse0): New.
(dns_opt_push0, dns_opt_cmp0, dns_opt_print0, dns_ptr_parse0): New.
(dns_ptr_push0, dns_ptr_cmp0, dns_ptr_print0, dns_ptr_cname0): New.
(dns_sshfp_parse0, dns_sshfp_push0, dns_sshfp_cmp0): New.
(dns_sshfp_print0, dns_txt_parse0, dns_txt_push0, dns_txt_cmp0): New.
(struct dns_rrtype): Add function prototypes.
(dns_rrtypes): Use "0" variant of functions.
(DNS_PRAGMA_PUSH, DNS_PRAGMA_POP): Remove.