busybox: support only one version

This commit removes the version selection for the busybox
package. Busybox is very well maintained, and bugs are typically fixed
in a timely fashion. Moreover, regressions are fairly unlikely in this
very stable and well-tested tool.

Therefore, there isn't a very compelling reason to have a version
selection for Busybox since we don't accept such a version selection
for the vast majority of other packages, unless there is a strong
reason to do so.

Consequently, this commit:

 * Removes the 1.19.4, 1.20.2 and 1.21.1 Busybox versions, patches and
   default configuration file.

 * Moves the 1.22.1 patches from package/busybox/1.22.1 to just
   package/busybox/ like all other packages.

 * Renames the default 1.22.1 configuration file to just
   busybox.config.

 * Adapts the busybox.mk makefile to encode the current version to
   use.

 * Adds appropriate options to Config.in.legacy. However, even though
   the BR2_BUSYBOX_VERSION_1_22_X is removed, we don't add a
   Config.in.legacy option for it, since it would cause a legacy
   warning for virtually *all* users as most people are currently
   using 1.22.x.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

1 files changed, 0 insertions, 33 deletions

diff --git a/package/busybox/1.21.1/0002-network-ifconfig-include-linux-if_slip.h-instead-of-.patch b/package/busybox/1.21.1/0002-network-ifconfig-include-linux-if_slip.h-instead-of-.patch
deleted file mode 100644
index ed35719906..0000000000
--- a/package/busybox/1.21.1/0002-network-ifconfig-include-linux-if_slip.h-instead-of-.patch
+++ /dev/null
@@ -1,33 +0,0 @@
-From 5eae213031a3ef88fe8d9d0a387f44264ea635cc Mon Sep 17 00:00:00 2001
-From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Date: Sat, 5 Oct 2013 15:53:16 +0200
-Subject: [PATCH 2/3] network/ifconfig: include <linux/if_slip.h> instead of
- <net/if_slip.h>
-
-The musl C library doesn't provide the <net/if_slip.h> since userspace
-applications can just as well use the <linux/if_slip.h> kernel header.
-
-This commit fixes the build of the ifconfig applet with the musl C
-library.
-
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
----
- networking/ifconfig.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/networking/ifconfig.c b/networking/ifconfig.c
-index 782374b..c90ed6b 100644
---- a/networking/ifconfig.c
-+++ b/networking/ifconfig.c
-@@ -56,7 +56,7 @@
- #endif
- 
- #if ENABLE_FEATURE_IFCONFIG_SLIP
--# include <net/if_slip.h>
-+# include <linux/if_slip.h>
- #endif
- 
- /* I don't know if this is needed for busybox or not.  Anyone? */
--- 
-1.8.1.2
-