Add an option to a comma separated option list
@param opts is a pointer to an option list, may point to a NULL value @param opt is the option to add @return -1 on allocation error, 0 on success
See Implementation
Add an option to a comma separated option list
@param opts is a pointer to an option list, may point to a NULL value @param opt is the option to add @return -1 on allocation error, 0 on success