This reverts commit 6170c46b47.
There has been demand for further evaluation of the impact of a
changed hostname, so this is reverted for now. The default hostname
will be "OpenWrt" again after this commit.
The macaddr_geteui() function is not removed by this revert.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>