Are setcap-changes permanent

The setcap on the file stores the capabilities in an extended attribute with a call to setxattr. This extended attribute is stored like other attributes (ownership, rights...) in the filesystem.

Since kernel 2.6.24, the kernel supports associating capability sets with an executable file using setcap(8). The file capability sets are stored in an extended attribute (see setxattr(2)) named security.capability.

So, you don't have to reset your cap on each reboot.