improve comment that explains setting of $CURL_CA_BUNDLE on RHEL-based systems

Co-authored-by: ocaisa <alan.ocais@cecam.org>

Author: boegel

init/eessi_environment_variables

@@ -107,6 +107,9 @@ if [ -d $EESSI_PREFIX ]; then
           fi
 
         # Fix wrong path for RHEL >=8 libcurl 
+	# This is required here because we ship curl in our compat layer. If we only provided
+	# curl as a module file we could instead do this via a `modluafooter` in an EasyBuild
+	# hook (or via an Lmod hook)
 	rhel_libcurl_file="/etc/pki/tls/certs/ca-bundle.crt"
         if [ -f $rhel_libcurl_file ]; then
           show_msg "Found libcurl CAs file at RHEL location, setting CURL_CA_BUNDLE"