Bug 1794476

postfix-3.4.8-2.fc32 fails to build with GCC 10 in Fedora 32:

gcc -shared -Wl,-soname,libpostfix-global.so -Wl,-rpath,/usr/lib64/postfix -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-z,relro,-z,now -o libpostfix-global.so abounce.o anvil_clnt.o been_here.o bounce.o bounce_log.o canon_addr.o cfg_parser.o cleanup_strerror.o cleanup_strflags.o clnt_stream.o conv_time.o db_common.o debug_peer.o debug_process.o defer.o deliver_completed.o deliver_flock.o deliver_pass.o deliver_request.o dict_proxy.o domain_list.o dot_lockfile.o dot_lockfile_as.o dsb_scan.o dsn.o dsn_buf.o dsn_mask.o dsn_print.o dsn_util.o ehlo_mask.o ext_prop.o file_id.o flush_clnt.o header_opts.o header_token.o input_transp.o int_filt.o is_header.o log_adhoc.o mail_addr.o mail_addr_crunch.o mail_addr_find.o mail_addr_map.o mail_command_client.o mail_command_server.o mail_conf.o mail_conf_bool.o mail_conf_int.o mail_conf_long.o mail_conf_raw.o mail_conf_str.o mail_conf_time.o mail_connect.o mail_copy.o mail_date.o mail_dict.o mail_error.o mail_flush.o mail_open_ok.o mail_params.o mail_pathname.o mail_queue.o mail_run.o mail_scan_dir.o mail_stream.o mail_task.o mail_trigger.o maps.o mark_corrupt.o match_parent_style.o mbox_conf.o mbox_open.o mime_state.o mkmap_db.o mkmap_dbm.o mkmap_open.o msg_stats_print.o msg_stats_scan.o mynetworks.o mypwd.o namadr_list.o off_cvt.o opened.o own_inet_addr.o pipe_command.o post_mail.o quote_821_local.o quote_822_local.o rcpt_buf.o rcpt_print.o rec_attr_map.o rec_streamlf.o rec_type.o recipient_list.o record.o remove.o resolve_clnt.o resolve_local.o rewrite_clnt.o scache_clnt.o scache_multi.o scache_single.o sent.o smtp_stream.o split_addr.o string_list.o strip_addr.o sys_exits.o timed_ipc.o tok822_find.o tok822_node.o tok822_parse.o tok822_resolve.o tok822_rewrite.o tok822_tree.o trace.o user_acl.o valid_mailhost_addr.o verify.o verify_clnt.o verp_sender.o wildcard_inet_addr.o xtext.o delivered_hdr.o fold_addr.o header_body_checks.o mkmap_proxy.o data_redirect.o match_service.o mail_conf_nint.o addr_match_list.o mail_conf_nbool.o smtp_reply_footer.o safe_ultostr.o verify_sender_addr.o dict_memcache.o mail_version.o memcache_proto.o server_acl.o mkmap_fail.o haproxy_srvr.o dsn_filter.o dynamicmaps.o uxtext.o smtputf8.o attr_override.o mail_parm_split.o midna_adomain.o  mail_addr_form.o quote_flags.o maillog_client.o -lnsl -L/usr/lib64/sasl2 -lsasl2 -lssl -lcrypto -ldb -lnsl -lresolv -ldl -licui18n -licuuc -licudata
/usr/bin/ld: anvil_clnt.o: in function `$d':
/builddir/build/BUILD/postfix-3.4.8/src/global/./mail_params.h:3999: multiple definition of `var_tlsp_clnt_policy'; abounce.o:/builddir/build/BUILD/postfix-3.4.8/src/global/./mail_params.h:3999: first defined here