[pkg-go] Bug#993713: golang-github-xenolf-lego accesses the internet during the build

[Adrian Bunk]

Source: golang-github-xenolf-lego
Version: 4.1.3-1
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/experimental/amd64/golang-github-xenolf-lego.html

...
    edgedns_test.go:207: 
        	Error Trace:	edgedns_test.go:207
        	Error:      	Received unexpected error:
        	            	could not find the start of authority for bar.com.: dial udp: lookup google-public-dns-b.google.com on [::1]:53: read udp [::1]:40563->[::1]:53: read: connection refused
        	Test:       	TestDNSProvider_findZone/Extract_root_record_name
=== CONT  TestDNSProvider_findZone/Extract_sub_record_name
    edgedns_test.go:207: 
        	Error Trace:	edgedns_test.go:207
        	Error:      	Received unexpected error:
        	            	could not find the start of authority for foo.bar.com.: dial udp: lookup google-public-dns-b.google.com on [::1]:53: read udp [::1]:37392->[::1]:53: read: connection refused
        	Test:       	TestDNSProvider_findZone/Extract_sub_record_name
--- FAIL: TestDNSProvider_findZone (0.00s)
...


https://buildd.debian.org/status/fetch.php?pkg=golang-github-xenolf-lego&arch=all&ver=4.1.3-2&stamp=1630837084&raw=0

...
    client_test.go:19: 
        	Error Trace:	client_test.go:19
        	Error:      	Received unexpected error:
        	            	Get "https://api.reg.ru/api/regru2/zone/remove_record?input_data=%7B%22username%22%3A%22test%22%2C%22password%22%3A%22test%22%2C%22domains%22%3A%5B%7B%22dname%22%3A%22test.ru%22%7D%5D%2C%22subdomain%22%3A%22_acme-challenge%22%2C%22content%22%3A%22txttxttxt%22%2C%22record_type%22%3A%22TXT%22%2C%22output_content_type%22%3A%22plain%22%7D&input_format=json": dial tcp 194.58.116.30:443: connect: network is unreachable
        	Test:       	TestRemoveRecord
--- FAIL: TestRemoveRecord (0.13s)
...