krb5 commit [krb5-1.16]: Document comments in krb5.conf

https://github.com/krb5/krb5/commit/3a5c43467c5095dc7e1b3cc2eca50993c59b79ad
commit 3a5c43467c5095dc7e1b3cc2eca50993c59b79ad
Author: Greg Hudson <[email protected]>
Date:   Fri Mar 30 16:54:44 2018 -0400

    Document comments in krb5.conf
    
    (cherry picked from commit 80a4d553d54f09d7467f090a92964236a7a7d44b)
    
    ticket: 8660
    version_fixed: 1.16.1

 doc/admin/conf_files/krb5_conf.rst |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/doc/admin/conf_files/krb5_conf.rst b/doc/admin/conf_files/krb5_conf.rst
index 4ed9832..3d33dba 100644
--- a/doc/admin/conf_files/krb5_conf.rst
+++ b/doc/admin/conf_files/krb5_conf.rst
@@ -21,8 +21,10 @@ Structure
 ---------
 
 The krb5.conf file is set up in the style of a Windows INI file.
-Sections are headed by the section name, in square brackets.  Each
-section may contain zero or more relations, of the form::
+Lines beginning with '#' or ';' (possibly after initial whitespace)
+are ignored as comments.  Sections are headed by the section name, in
+square brackets.  Each section may contain zero or more relations, of
+the form::
 
     foo = bar