Log Message:
amass: Update to version 3.11.1

pkgsrc changes:
 - Move all GO_MODULE_FILES definition to a separate go-modules.mk file to make
   Makefile a bit more readable

Changes:
3.11.1
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 - Updated the CertSpotter script
 - Significant speedup to DNS queries
 - Added old CertSpotter API
 - Added ThreatBook as a data source #530

3.11.0
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 - graph: compare IP addresses with net package
 - added the ThreadFix article
 - Update config.ini
 - Update UA to 87.0.4280.49 Safari/537.36
 - Stopped using the IP2ASN API
 - Improved the handling of ASN info and DNS queries
 - Implemented the intel features using the pipeline
 - Added Anubis and SonarSearch as data sources #530