* .mailmap: Add an alias for last commit.

gcc 4.6 warns when a variable is initialized but isn't used afterwards:

vmware/vmware_driver.c:449:18: warning: variable 'vmxPath' set but not used [-Wunused-but-set-variable]

This patch fixes these warnings. There are still 2 offending files:

- vbox_tmpl.c: the variable is used inside an #ifdef and is assigned several
  times outside of #ifdef. Fixing the warning would have required wrapping
  all the assignment inside #ifdef which hurts readability.

vbox/vbox_tmpl.c: In function 'vboxAttachDrives':
vbox/vbox_tmpl.c:3918:22: warning: variable 'accessMode' set but not used [-Wunused-but-set-variable]

- esx_vi_types.generated.c: the name implies it's generated code and I
  didn't want to dive into the code generator

esx/esx_vi_types.generated.c: In function 'esxVI_FileQueryFlags_Free':
esx/esx_vi_types.generated.c:1203:3: warning: variable 'item' set but not used [-Wunused-but-set-variable]

* AUTHORS (Soren Hansen): Update address.
* .mailmap: Alias other addresses to new preference.

virDiskNameToIndex has a list of disk name prefixes that it uses in the
process of finding the disk's index. This list is missing "ubd" which
is the disk prefix used for UML domains.
Signed-off-by: NSoren Hansen <soren@linux2go.dk>

* .mailmap: Map a stray commit-author email address to the canonical one.
Reported by Justin Clift.

* cfg.mk (sc_check_AUTHOR_list): New rule.
* .mailmap: New file, to tell git log how to map email addresses.