Bug 6600

Git rev: master/8b7116d25ed6255a03895d835e5a0560858ab496

Steps:
1. Start HOB.
2. Click Settings -> Shared state
3. Add a URL in default shared state mirrors. For example: http://128.224.162.103/sstate/PATH;downloadfilename=PATH
4. Click Save button
 
Check the conf/local.conf, the following lines are added:
#added by hob
SSTATE_MIRRORS = "file://(.*) http://128.224.162.103/sstate/PATH;downloadfilename=PATH\1 \n   "

There are extra "\1" characters in the line. It makes the sstate mirror doesn't work. When building the image, I got the following errors:

#################
NOTE: Running setscene task 2 of 721 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_populate_sysroot_setscene)
NOTE: Running setscene task 3 of 721 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_populate_lic_setscene)
WARNING: Failed to fetch URL file://67/sstate:busybox:i586-poky-linux:1.22.1:r32:i586:3:6744276ed9429961db547686916c7eb5_populate_sysroot.tgz, attempting MIRRORS if available
ERROR: Fetcher failure: Unable to find file file://67/sstate:busybox:i586-poky-linux:1.22.1:r32:i586:3:6744276ed9429961db547686916c7eb5_populate_sysroot.tgz anywhere. The paths that were searched were:
    /home/builder/poky/build/sstate-cache
NOTE: recipe busybox-1.22.1-r32: task do_populate_sysroot_setscene: Failed
WARNING: Setscene task 0 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_populate_sysroot_setscene) failed with exit code '1' - real task will be run instead
NOTE: Running setscene task 4 of 721 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_package_qa_setscene)
WARNING: Failed to fetch URL file://38/sstate:busybox::1.22.1:r32::3:389e157cbe015359c5fe1b19836982ba_populate_lic.tgz, attempting MIRRORS if available
ERROR: Fetcher failure: Unable to find file file://38/sstate:busybox::1.22.1:r32::3:389e157cbe015359c5fe1b19836982ba_populate_lic.tgz anywhere. The paths that were searched were:
    /home/builder/poky/build/sstate-cache
NOTE: recipe busybox-1.22.1-r32: task do_populate_lic_setscene: Failed
######################

When I remove the "\1" manually. The sstate mirror works fine:
#####################
NOTE: Preparing runqueue
NOTE: Executing SetScene Tasks
NOTE: Running setscene task 2 of 721 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_populate_sysroot_setscene)
NOTE: Running setscene task 3 of 721 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_populate_lic_setscene)
NOTE: recipe busybox-1.22.1-r32: task do_populate_lic_setscene: Succeeded
NOTE: Running setscene task 4 of 721 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_package_qa_setscene)
NOTE: recipe busybox-1.22.1-r32: task do_populate_sysroot_setscene: Succeeded
NOTE: Running setscene task 5 of 721 (/home/builder/poky/meta/recipes-core/busybox/busybox_1.22.1.bb, do_package_write_ipk_setscene)
NOTE: recipe busybox-1.22.1-r32: task do_package_qa_setscene: Succeeded
NOTE: Running setscene task 6 of 721 (/home/builder/poky/meta/recipes-core/sysvinit/sysvinit_2.88dsf.bb, do_populate_sysroot_setscene)
NOTE: recipe sysvinit-2.88dsf-r14: task do_populate_sysroot_setscene: Succeeded
NOTE: Running setscene task 7 of 721 (/home/builder/poky/meta/recipes-core/sysvinit/sysvinit_2.88dsf.bb, do_populate_lic_setscene)
NOTE: recipe busybox-1.22.1-r32: task do_package_write_ipk_setscene: Succeeded
########################