dropbear: use config_get_bool enable

The config_get_bool also works with on/off, yes/no, true/false.
Add 'main' section name. This will make it easier to change settings from uci.
Add a link to documentation.

Signed-off-by: Sergey Ponomarev <stokito@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/15579
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/network/services/dropbear/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dropbear
 PKG_VERSION:=2024.85
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:= \

package/network/services/dropbear/files/dropbear.config

@@ -1,4 +1,6 @@
-config dropbear
+# See https://openwrt.org/docs/guide-user/base-system/dropbear
+config dropbear main
+	option enable '1'
 	option PasswordAuth 'on'
 	option RootPasswordAuth 'on'
 	option Port         '22'

package/network/services/dropbear/files/dropbear.init

@@ -361,7 +361,7 @@ dropbear_instance()
 load_interfaces()
 {
 	local enable
-	config_get enable "$1" enable 1
+	config_get_bool enable "$1" enable 1
 	[ "${enable}" = "1" ] || return 0
 
 	local direct_iface iface