Documentation of requirements for objectlist "SDOobjects"

[whoTBecker]

I recommend following requirements for the expected objectlist to be documented for the user, to ensure the SOES works properly.

Requirements for objectlist array "SDOobjects":

• Objects are in ascending order of their index.
• For last element, a dummy object with index 0xFFFF is provided.

Requirements for elements of an object:

• "name" points to a NUL-terminated cstring. 'NULL' is not allowed.

Requirements for objectdescriptions of an object within "SDOobjects":

• Elements are in ascending order of their subindex.
• The first element's subindex equals 0.
• The last element's subindex equals object's maxsub value.

Requirements for elements of an (subindex-)objectdescription:

• "name" points to a NUL-terminated cstring. 'NULL' is not allowed.