Increase length of City field MDL-19629 - longest place name in NZ is Taumata­whakatangihanga­koauau­o­tamatea­turi­pukakapiki­maunga­horo­nuku­pokai­whenua­kitanatahu which doesn't fit in 20 chars, I figure 100 chars should be enough

lib/moodlelib.php

@@ -3391,7 +3391,7 @@ function truncate_userinfo($info) {
                     'institution' =>  40,
                     'department'  =>  30,
                     'address'     =>  70,
-                    'city'        =>  20,
+                    'city'        => 100,
                     'country'     =>   2,
                     'url'         => 255,
                     );