Computes the list of packages optionally requiring a given package.
The return value of this function is a newly allocated
list of package names (char*), it should be freed by the caller.
@param pkg a package
@return the list of packages optionally requiring pkg
Computes the list of packages optionally requiring a given package. The return value of this function is a newly allocated list of package names (char*), it should be freed by the caller. @param pkg a package @return the list of packages optionally requiring pkg