Bump BlackArch to 2018.06.01

src/blackarch.ipxe

@@ -9,13 +9,12 @@ goto ${menu}
 set os BlackArch Linux
 menu ${os} Installers
 item --gap Official Releases
-item 2017.12.11 ${space} ${os} 2017.12.11
-item 2017.08.30 ${space} ${os} 2017.08.30
+item 2018.06.01 ${space} ${os} 2018.06.01
 choose blackarch_version || goto blackarch_exit
 goto blackarch_boot
 
 :blackarch_boot
-set blackarch_initrd http://www.mirrorservice.org/sites/blackarch.org/blackarch/iso/blackarchlinux-netinst-${blackarch_version}-x86_64.iso
+set blackarch_initrd http://distro.ibiblio.org/blackarch/iso/blackarch-linux-netinst-${blackarch_version}-x86_64.iso
 kernel ${memdisk} iso raw
 initrd ${blackarch_initrd}
 boot