read: Support arrays, character splitting

Enhance the `read` builtin to support creating an array with the --array
flag. With --array, only a single variable name is allowed and the
entire input is tokenized and placed into that variable as an array.

Also add custom behavior if IFS is empty or unset. In that event, split
the input on every character, instead of the previous behavior of doing
no splitting at all.

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/read.status b/tests/read.status
new file mode 100644
index 00000000..573541ac
--- /dev/null
+++ b/tests/read.status
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+0