[feature request] add the ability to set mount options when partitioning a disk

[saber716rus]

You can add a mount point to your disk markup, but you cannot manually register the mount option. Example: I am creating a disk on hdd and I need to register an option to btrfs "autodefrag" to reduce fragmentation on the disk, or to register compression on the ssd, but this cannot be done in your markup.

[mikhailnov]

+1 for this. @saber716rus is writing about Anaconda+blivet partitioning GUI.