-- is implemented in getopt(3)
-? is an unnecessary case statement and not useful

delete my last commit
Submitted by: pst, ache

option -f and -i are exclusive
all flag variables initialized with zero
respond `Y' is equal to `y'
update usage string
prompt only if source exist

ignore -i option if file descriptor stdin not refe

option -f and -i are exclusive
all flag variables initialized with zero
respond `Y' is equal to `y'
update usage string
prompt only if source exist

ignore -i option if file descriptor stdin not refers to a valid
terminal type device

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Handle trailing slashes in source filenames correctly. E.g., rewrite
`mv foo/ ../..' to `mv foo/ ../../foo/', not to `mv foo/ ../../'. The
latter caused a panic. Before the trailing slash changes

Handle trailing slashes in source filenames correctly. E.g., rewrite
`mv foo/ ../..' to `mv foo/ ../../foo/', not to `mv foo/ ../../'. The
latter caused a panic. Before the trailing slash changes in the kernel,
the trailing slashes caused the rename() for this mv to fail earlier, so
there was no panic in 2.0.

Fixes part of PR 760.

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Added $Id$

BSD 4.4 Lite bin Sources