tar compability modes for dpkg

I've found couple of deb files which require old tar compability modes
to be unpacked. This patch allows me to enable them for dpkg without
enabling tar.

Signed-off-by: Kim B. Heino <Kim.Heino@bluegiga.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/archival/Config.in b/archival/Config.in
index 9e2e88c..c99896b 100644
--- a/archival/Config.in
+++ b/archival/Config.in
@@ -214,8 +214,6 @@
 	  create compressed archives. It's probably the most widely used
 	  UNIX archive program.
 
-if TAR
-
 config FEATURE_TAR_CREATE
 	bool "Enable archive creation"
 	default y
@@ -227,7 +225,7 @@
 config FEATURE_TAR_AUTODETECT
 	bool "Autodetect compressed tarballs"
 	default n
-	depends on FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA
+	depends on TAR && (FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA)
 	help
 	  With this option tar can automatically detect compressed
 	  tarballs. Currently it works only on files (not pipes etc).
@@ -243,7 +241,7 @@
 config FEATURE_TAR_OLDGNU_COMPATIBILITY
 	bool "Support for old tar header format"
 	default N
-	depends on TAR
+	depends on TAR || DPKG
 	help
 	  This option is required to unpack archives created in
 	  the old GNU format; help to kill this old format by
@@ -252,7 +250,7 @@
 config FEATURE_TAR_OLDSUN_COMPATIBILITY
 	bool "Enable untarring of tarballs with checksums produced by buggy Sun tar"
 	default N
-	depends on TAR
+	depends on TAR || DPKG
 	help
 	  This option is required to unpack archives created by some old
 	  version of Sun's tar (it was calculating checksum using signed
@@ -262,7 +260,7 @@
 config FEATURE_TAR_GNU_EXTENSIONS
 	bool "Support for GNU tar extensions (long filenames)"
 	default y
-	depends on TAR
+	depends on TAR || DPKG
 	help
 	  With this option busybox supports GNU long filenames and
 	  linknames.
@@ -291,8 +289,6 @@
 	  With this option busybox supports GNU tar -m
 	  (do not preserve time) option.
 
-endif #tar
-
 config UNCOMPRESS
 	bool "uncompress"
 	default n