libtorrent: drop sigc dep & switch homepage

libsigc isn't used/needed any longer so drop it.
And switch to the proper homepage rather than the tarball repository.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libtorrent/Config.in

@@ -3,11 +3,10 @@ config BR2_PACKAGE_LIBTORRENT
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_ARCH_HAS_ATOMICS
-	select BR2_PACKAGE_LIBSIGC
 	help
 	  BitTorrent library written in C++ for *nix
 
-	  http://rtorrent.net/downloads/
+	  https://github.com/rakshasa/libtorrent
 
 comment "libtorrent needs a toolchain w/ C++, threads"
 	depends on BR2_ARCH_HAS_ATOMICS

package/libtorrent/libtorrent.mk

@@ -6,7 +6,7 @@
 
 LIBTORRENT_VERSION = 0.13.6
 LIBTORRENT_SITE = http://rtorrent.net/downloads
-LIBTORRENT_DEPENDENCIES = host-pkgconf libsigc \
+LIBTORRENT_DEPENDENCIES = host-pkgconf \
 	$(if $(BR2_PACKAGE_OPENSSL),openssl) \
 	$(if $(BR2_PACKAGE_ZLIB),zlib)
 LIBTORRENT_CONF_OPTS = --enable-aligned \