package/chrony: use libedit for command line editing

chrony is licensed under GPL-2.0, which is not license compatible with
readline (GPL-3.0+), so remove the optional readline handling and replace
with libedit instead.

While we are at it, also explicitly disable the libedit backend when not
available.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit baadfbcc02298d03b7d532cb37eb31b26322d68b)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/chrony/chrony.mk

@@ -13,6 +13,7 @@ CHRONY_CONF_OPTS = \
 	--host-system=Linux \
 	--host-machine=$(BR2_ARCH) \
 	--prefix=/usr \
+	--without-readline \
 	--without-tomcrypt
 
 ifeq ($(BR2_PACKAGE_LIBCAP),y)
@@ -34,10 +35,10 @@ else
 CHRONY_CONF_OPTS += --without-seccomp
 endif
 
-ifeq ($(BR2_PACKAGE_READLINE),y)
-CHRONY_DEPENDENCIES += readline
+ifeq ($(BR2_PACKAGE_LIBEDIT),y)
+CHRONY_DEPENDENCIES += libedit
 else
-CHRONY_CONF_OPTS += --disable-readline
+CHRONY_CONF_OPTS += --without-editline --disable-readline
 endif
 
 # If pps-tools is available, build it before so the package can use it