Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Don't forget to clear out the hold space for each subsequent file
when in -i mode so that each file gets a clean context of its own.

Add a regression test for the bug.

Tested with: regression tests

Change the semantics of -i (in-place editing) so that it treats
each file independently from other files. The new semantics are
desired in the most of practical cases, e.g.: delete lines 5-9
from each file.

Keep the previous semantics of -i under a new option, -I, which
uses a single continuous address space covering all files to edit
in-place -- they are too cool to just drop them.

Add regression tests for -i and -I.

Approved by: dds
Compared with: GNU sed
Discussed on: -hackers
MFC after: 2 weeks

Per letter dated July 22, 1999 remove 3rd clause of Berkeley derived
software (original contributor).

Reviewed by: imp

Reimplement in-place editing in a slightly less disgusting manner. Also,
make an effort to preserve the ownership and mode of the file we are
editing.

Sponsored by: Registrar AS

Make cspace()'s second argument const. Make `escapes' in lputs() const.

Avoid checking whether each line is the last line of the file when we don't
need to know. Instead, check when we are trying to match a "$" address.
This does not change the way sed processes regular files, but makes it behave
more sensibly when used interactively.

PR: 40101
MFC after: 2 weeks

remove __P

WARNS=2 partial fix; use NO_WERROR to protect against some hard-to-fix warnings.

Use __FBSDID(), kill register keyword.

Expand xmalloc in-place, along with xrealloc; which wasn't even ANSI in its
implementation.

Uncorrupt the SCCS id (s/ From: / /).
Put a tab before the comment for "rflags".

Submitted by: bde

Add a new flag: -E enables "extended" regular expressions.

Add $FreeBSD$.

Fix a new bug introduced by the previous bug fix

Remove local redefinition for err(). Add usage().

This commit was generated by cvs2svn to compensate for changes in r1590,
which included commits to RCS files with non-trunk default branches.

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