Currently seven wonders have a healing aura and heal garrisoned units at 8 health per second, whereas the other six wonders heal them at only 1 health per second. There is no good explanation for this (all wonders are based on religious sites) and the factor eight difference is highly unbalanced.
This patch gives all wonders:
* a garrison heal value of 5 health per second (for comparison, temples have 3);
* a garrison capacity of 50 (for comparison, normal temples have 20, `kush_temple_amun.xml` and `rome_temple_mars.xml` 30);
* a “Soldier” garrison class (instead of Cavalry and Infantry), so war elephants can also be healed inside (worker elephants were already possible).