Bug 21203

A mail I sent to -hackers on Aug 23..

From: Peter Pentchev <roam@orbitel.bg>
To: freebsd-hackers@freebsd.org
Subject: MFC of sed -E

Hey there,

Is there any compelling reason not to merge the extended regexp capabilities
of /usr/bin/sed?  The patches in the following revisions apply cleanly
to RELENG_4's sed (except for the $FreeBSD id's, of course ;), and -E
works as expected.

src/usr.bin/sed/compile.c 1.14
src/usr.bin/sed/extern.h  1.5
src/usr.bin/sed/main.c    1.10
src/usr.bin/sed/sed.1     1.10

G'luck,
Peter

--- end of previous e-mail

I received no reply, so I guess no one has any compelling reasons :)

Fix: 

Apply the patches from the revisions listed above. Works for me.
How-To-Repeat: 
try to do anything a bit complexish with sed; grow slightly irritated ;)