Multiple improvements for XBPS_PREFER_BINPKG_DEPS.

- Added a new var XBPS_REPO_LIST for the conf file, to specify
  a list of remote repositories to be used in a masterdir.
- Install all required binpkgs in one pass, if that fails install
  one of them at every pass.
- Fixed xbps-src-chroot-helper to properly catch SIG{INT,QUIT}
  when -m is specified.
- Misc cosmetics improvements.

--HG--
extra : convert_revision : 0ad7d559477ccc1fc04ab09deb791343ee453de6

xbps-src/shutils/pkgtarget_funcs.sh.in

@@ -65,6 +65,7 @@ install_pkg()
 	#
 	if [ -z "$doing_deps" ]; then
 		install_dependencies_pkg $pkg
+		[ $? -ne 0 ] && return $?
 		#
 		# At this point all required deps are installed, and
 		# only remaining is the origin package; install it.
@@ -123,7 +124,7 @@ install_pkg_with_binpkg()
 
 	msg_normal "Installing binary pkg: $pkgpattern"
 	${fakeroot_cmd} ${fakeroot_cmd_args} ${XBPS_BIN_CMD} \
-		-y install "$pkgpattern"
+		-y install \""$pkgpattern\""
 	return $?
 }