rm: option -I and --interactive=once are not behaving equivalently

[Judit Foglszinger]

Hi,

Regarding to the manpage and comments in rm.c,
the option -I of rm is meant to be the same as --interactive=once

It isn't, since when removing a write-protected file,
rm prompts if --interactive=once is given, 
but it doesn't prompt, if -I is given.

This behaviour of rm -I is surprising, 
since rm even prompts before removing a write-protected file, 
if no extra interactivity is asked for.

It can be changed easily by changing line 268 of rm.c

from

x.interactive = RMI_NEVER;

to

x.interactive = RMI_SOMETIMES;

(see attached diff)

rmc.diff
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