Enable mod_headers by default. The nginx package has this built-in and

enabled. Should prevent issue with users creating custom Apache configs
and restarts subsequently failing because mod_headers is not enabled.

Author: barry-smithjr

install/hst-install-debian.sh

@@ -1600,6 +1600,7 @@ if [ "$apache" = 'yes' ]; then
 	a2enmod suexec > /dev/null 2>&1
 	a2enmod ssl > /dev/null 2>&1
 	a2enmod actions > /dev/null 2>&1
+  a2enmod headers > /dev/null 2>&1
 	a2dismod --quiet status > /dev/null 2>&1
 	a2enmod --quiet hestia-status > /dev/null 2>&1
 

install/hst-install-ubuntu.sh

@@ -1615,6 +1615,7 @@ if [ "$apache" = 'yes' ]; then
 	a2enmod suexec > /dev/null 2>&1
 	a2enmod ssl > /dev/null 2>&1
 	a2enmod actions > /dev/null 2>&1
+  a2enmod headers > /dev/null 2>&1
 	a2dismod --quiet status > /dev/null 2>&1
 	a2enmod --quiet hestia-status > /dev/null 2>&1