Merge remote-tracking branch 'upstream/master' into microsoft

.travis.yml

Dockerfile

Makefile

README.md

example-server.conf

generate/migration/migration.go

generate/static/static.go

regen.sh

run_tests.sh

server/a_server-packr.go

server/handlers_test.go

server/static/static.go

server/store/a_store-packr.go

server/store/mem.go

server/store/migrations/migrations_test.go

...e/migrations/mysql/20180626224600_create_issued_certs.sql

...igrations/mysql/20180807223808_idx_revoked_expires_at.sql

...migrations/sqlite3/20180626224600_create_issued_certs.sql

...rations/sqlite3/20180807223808_idx_revoked_expires_at.sql

server/store/sqldb.go