.conf file in includedir

[Weijun Wang]

I've just noticed some change in krb5.conf's includedir directive [1]:

    "Including a directory includes all files within the directory whose 
names consist solely of alphanumeric characters, dashes, or underscores. 
Starting in release 1.15, files with names ending in ”.conf” are also 
included."

My understanding of the old rule is to exclude OS-generated files like 
.DS_Store and desktop.ini, but is it safe to include all ".conf" files? 
At least I've heard that if you let a macOS access your non-Apple file 
system, it will likely to create a ._krb5.conf file beside your existing 
krb5.conf file.

Thanks
Max

[1] 
http://web.mit.edu/kerberos/krb5-devel/doc/admin/conf_files/krb5_conf.html