--- /dev/null
+# current is 7.78.0 ATM
+# 7.21.5-7.29.0 fail to configure on gh actions
+
+alpine: 7.78.0 7.67.0
+centos: 7.61.1 # 7.29.0
+debian: 7.74.0 7.64.0 7.52.1
+fedora: 7.78.0 7.76.1 7.71.1
+other: 7.49.1 7.31.0
+ubuntu: 7.74.0 7.68.0 7.58.0
+
+# always test against a few recent
+latest: master 7.78.0 7.77.0 7.76.1
+oldest: 7.18.2 7.19.7 7.20.1
+
+# 7.64.1 fails client tests because of superfluous infof() calls
+# 7.64.0 fails client cookie test because of curl/curl#3613