Adds settings for user provided media

Adds settings for setting urls in boot.cfg for user provided
media.

roles/netbootxyz/templates/menu/boot.cfg.j2

@@ -25,6 +25,13 @@ set sigs {{ sigs_location }}
 # set location of latest iPXE
 iseq ${platform} efi && set ipxe_disk netboot.xyz-snponly.efi || set ipxe_disk netboot.xyz-undionly.kpxe
 
+######################################
+# Media Locations for Licensed Distros
+######################################
+
+set rhel_base_url {{ rhel_base_url | default("") }}
+set win_base_url {{ win_base_url | default("") }}
+
 ##################
 # official mirrors
 ##################

user_overrides.yml

@@ -29,3 +29,7 @@ generate_checksums: true
 #utilities_overrides:
 #  supergrub:
 #    enabled: false
+
+# set licensed media locations in boot.cfg
+# win_base_url:
+# rhel_base_url: