BUG/MINOR: chunk: Fix tests on the chunk size in functions copying data

When raw data are copied or appended in a chunk, the result must not exceed the
chunk size but it can reach it. Unlike functions to copy or append a string,
there is no terminating null byte.

This patch must be backported as far as 1.8. Note in 1.8, the functions
chunk_cpy() and chunk_cat() don't exist.
1 file changed