Add ability to use system libedit and update bundled libedit.

The version of libedit that is bundled with asterisk is old and has some bugs.
This patch updates the bundled version of libedit within asterisk, and also
updates asterisk to use the system libedit instead if one is available (and
pkg-config is available).  This review integrates several patches from other
users specifically kkm and tzafrir.

(closes issue #15929)
Reported by: kkm
Patches:
      015929-astcli-editrc-trunk.240324.diff uploaded by kkm (license 888)

(issue #16858)
Reported by: jw-asterisk

(closes issue #17039)
Reported by: tzafrir
Patches:
      0001-allow-using-system-copy-of-libedit.patch uploaded by tzafrir (license 46)

Review: https://reviewboard.asterisk.org/r/807/


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.8@280019 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 0 insertions, 42 deletions

diff --git a/main/editline/CHANGES b/main/editline/CHANGES
deleted file mode 100644
index c18b56cdf..000000000
--- a/main/editline/CHANGES
+++ /dev/null
@@ -1,42 +0,0 @@
-2002-02-25 : Christos Zoulas <christos@netbsd.org>
-	* Bring in constification fixes from NetBSD tree.
-	* Use NetBSD's vis, fgetln
-
-2002-02-10 : Jason Evans <jasone@freebsd.org>
-
-	* Makefile.in : Append "" arguments to for loops, to avoid syntax errors
-          with some shells that occur if there are no arguments to the for
-          loops.
-
-2002-02-09 : Jason Evans <jasone@freebsd.org>
-
-	* Install man pages in @prefix@/man/, rather than @prefix@/share/man.
-
-	* Fix the Darwin -install_name S_LDFLAGS argument to default to a prefix
-          of /usr/local if --prefix is not specified.
-
-2002-02-05 : Jason Evans <jasone@freebsd.org>
-
-	* Convert to using an autoconf-generated config.h, rather than passing
-	  -D_HAVE_<foo>=1 definitions on the command line.  Include sys.h in
-	  config.h, and include config.h in .c files rather than sys.h.
-
-	* Mangle function names for implementations in the np directory in order
-          to avoid namespace collisions with other code that may provide copies
-          of the same unimplemented functions.  For example:
-
-		#define	fgetln libedit_fgetln
-
-2002-02-03 : Jason Evans <jasone@freebsd.org>
-
-	* Add autoconf infrastructure, plus a generic Makefile that works with
-          at least BSD make, GNU make and Sun make.
-
-	* Port and/or test on FreeBSD 4.5, FreeBSD-current, NetBSD 1.5 (sparc64
-          and arm32), Apple OS X 10.1.2, Solaris 2.6, and Red Hat Linux 2.6.
-          Add the np directory, which contains implementations of non-portable
-          functions.
-
-	* Add the LIBEDIT_MAJOR and LIBEDIT_MINOR macros to histedit.h, since
-          there is otherwise no straightforward method of programmatically
-          detecting the library version.