Feature request: NUL delimiter for mapfile/readarray

[Charles Duffy]

Howdy --

Right now, mapfile isn't suitable for any case where arbitrary C strings
need to be read -- which is the case when handling filenames,
serializing/deserializing arbitrary command-line parameters, and many other
such situations.

Is there any chance of getting a -d '' (akin to read) or -0 (GNU
convention) option to allow NULs to be used? This significantly decreases
the number of places where I can use mapfile.

Thanks,
-- Charles