www-client/firefox: bump to 58.0.1 for security bug 646080

Also surpressed notify-send to hopefully prevent OOM sandbox violations,
enabled verbose build output, moved rust dependency atoms to mozconfig.eclass,
and expanded the rust atoms to include rust[extended] per Arfrever's
suggestions in bug 646078

Bug: http://bugs.gentoo.org/646080
Bug: http://bugs.gentoo.org/646078
Package-Manager: Portage-2.3.13, Repoman-2.3.3

eclass/mozconfig-v6.58.eclass

@@ -1,7 +1,7 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 #
-# @ECLASS: mozconfig-v6.57.eclass
+# @ECLASS: mozconfig-v6.58.eclass
 # @MAINTAINER:
 # mozilla team <[email protected]>
 # @BLURB: the new mozilla common configuration eclass for FF33 and newer, v6
@@ -103,8 +103,6 @@ RDEPEND=">=app-text/hunspell-1.5.4:=
 	media-libs/fontconfig
 	>=media-libs/freetype-2.4.10
 	kernel_linux? ( !pulseaudio? ( media-libs/alsa-lib ) )
-	pulseaudio? ( || ( media-sound/pulseaudio
-		>=media-sound/apulse-0.1.9 ) )
 	virtual/freedesktop-icon-theme
 	dbus? ( >=sys-apps/dbus-0.60
 		>=dev-libs/dbus-glib-0.72 )
@@ -167,8 +165,11 @@ DEPEND="app-arch/zip
 	>=sys-devel/binutils-2.16.1
 	sys-apps/findutils
 	pulseaudio? ( media-sound/pulseaudio )
-	>=virtual/rust-1.19.0
-	dev-util/cargo
+	|| (
+		( >=dev-lang/rust-1.21.0 >=dev-util/cargo-0.22.0 )
+		>=dev-lang/rust-1.21.0[extended]
+		( >=dev-lang/rust-bin-1.21.0 >=dev-util/cargo-0.22.0 )
+	)
 	${RDEPEND}"
 
 RDEPEND+="