Issue :  The MDExternalAccountBinding support is not available in jbcs-httpd-2.4.57 as it provide mod_md- 2.4.0-25 while support is available with mod_md-2.4.8 and later.

How to reproduce the issue:

step1: install jbcs-httpd-2.4.57 in RHEL 7
step2: Create a sample file like as follows:

$ cat mod_md.conf

MDExternalAccountBinding conf.d/test.json

$ cat conf.d/test.json

{{

}}

step3: start jbcs-httpd

step4: Check httpd.log, The jbcs-httpd will fail to start with following error

^{AH00526: Syntax error on line 1 of httpd/conf.d/mod_md.conf:
Invalid command 'MDExternalAccountBinding', perhaps misspelled or defined by a module not included in the server configuration}