Hardcore-fs/TinyWebServer — comment on commit 07f61e1468e97a9c519ca3d8843e89a54d9e4bca
File:  line 0
By Hardcore-fs:

made the pin select code for the Ethernet and SD card, non platform
specific by use of

CRITICAL
we have added code to turn off BOTH the ethernet & the SD card, before
calling each library to configure hte functions.
This is necessary, because a 'warm' reset appears to leave the pins in
an undefined state, until the library is called