Parsing apache configs is too strict

[leonblueconic]

When trying to setup nitro-enclaves-acm in conjunction with Apache httpd it took me a large part of the day to find out the replacements for SSLCertificateKeyFile & SSLCertificateFile will not be done when both entries are not at the start of a line. As normally http config files are indented to make them more readable I suspect a lot of people will run into this when migrating existing httpd configs for use with nitro enclaves. Please modify the code that it will allow for whitespace at the start of the line.