[bug #28511] string_t is limited to 1024 bytes

[Kalle Olavi Niemitalo]

Follow-up Comment #1, bug #28511 (project hurd):

Removing the limit would require changing the prototypes of several public
functions declared in <hurd/lookup.h> of glibc.  'string_t retry_name' might
be replaced with a pointer to a buffer-descriptor structure that contains: the
address of the buffer; the size of the buffer; and a code that indicates how
the buffer was allocated (malloc, mmap, or stack), i.e. how to free it if it
is replaced with a larger one.

Then if you're going to change those functions, it might be a good idea to add
void* parameters to function pointers, like in qsort_r vs. qsort.  That would
reduce the need for nested functions, which require trampolines in an
executable stack.

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