ciao, ho digitato ciò che mi hai detto  , via console, ed ecco cosa mi è comparso:
less /etc/httpd/conf/httpd.conf
Include "/usr/local/apache/conf/includes/pre_main_global.conf"
Include "/usr/local/apache/conf/includes/pre_main_2.conf"
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# # # # # # # # # # #
Direct modifications to the Apache configuration file may be lost upon subsequent re
generation of the       #
configuration file. To have modifications retained, all modifications must be checke
d into the              #
configuration system by running:
                    #
/usr/local/cpanel/bin/apache_conf_distiller --update
                    #
To see if your changes will be conserved, regenerate the Apache configuration file b
y running:              #
/usr/local/cpanel/bin/build_apache_conf
                    #
and check the configuration file for your alterations. If your changes have been ign
ored, then they will    #
need to be added directly to their respective template files.
                    #
                    #
It is also possible to add custom directives to the various "Include" files /etc/htt