Add testvars.sh to bitreq

Add all of the features to the lists.

async, async-https and proxy require std and are therfore not listed in
the no-std features.

Author: jamillambert

bitreq/contrib/test_vars.sh

@@ -0,0 +1,14 @@
+# No shebang, this file should not be executed.
+# shellcheck disable=SC2148
+#
+# disable verify unused vars, despite the fact that they are used when sourced
+# shellcheck disable=SC2034
+
+# Test all these features with "std" enabled.
+FEATURES_WITH_STD="log https https-rustls proxy async async-https"
+
+# Test all these features without "std" enabled.
+FEATURES_WITHOUT_STD="log https https-rustls"
+
+# Run these examples.
+EXAMPLES=""