Log Message:
tig: update to 2.5.3.

tig-2.5.3
---------

Bug fixes:

 - Fix autoconf checking for readline. (#1072)
 - Fix segfault when saving a view with no column.
 - Reset view->parent when main view is promoted.
 - Fix segfault when pressing Enter in a child main view.
 - Restore lazy navigation.
 - Format time_t values portably and fix other values too. (#1084, #1085)
 - Fix loop when wrapping line with ISO-8859-1 character. (#1087, #1088)