Revert "removed swap prio from fstab.semc | will be set by init.d script on boot"

This reverts commit 188a901375b7b5b159bf64db96408182f80fd4e3.
Revert "(re-)added swap prio"

This reverts commit dfc19ffe345558423d1cca47ae80fca35d678d0d.
Revert "fixed mount options of zram devices"

This reverts commit 314f89789f0be30592cacc7b5986cdf15e2e735e.
Revert "default zRam devices to 4 instead of 1"

This reverts commit 6fdadeaaf8ca4532f372e1b1689eb9a0bc63b026.