maint: fix typos

Our XML prefers "shareable" over "sharable".

* docs/internals/locking.html.in: s/sharable/shareable/
* src/locking/lock_driver_sanlock.c
(virLockManagerSanlockAddResource): Likewise.

docs/internals/locking.html.in

@@ -15,7 +15,7 @@
     <p>
       The high level goal is to prevent the same disk image being
       used by more than one QEMU instance at a time (unless the
-      disk is marked as sharable, or readonly). The scenarios
+      disk is marked as shareable, or readonly). The scenarios
       to be prevented are thus:
     </p>
 

src/locking/lock_driver_sanlock.c

@@ -634,7 +634,7 @@ static int virLockManagerSanlockAddResource(virLockManagerPtr lock,
     }
     if (flags & VIR_LOCK_MANAGER_RESOURCE_SHARED) {
         virLockError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                     _("Sharable leases are not supported"));
+                     _("Shareable leases are not supported"));
         return -1;
     }