feat(balance): Tone down the excessively high drag of many human frei…

…ghters (endless-sky#10753)

data/human/ships.txt

@@ -500,7 +500,7 @@ ship "Behemoth"
 		"required crew" 12
 		"bunks" 30
 		"mass" 1120
-		"drag" 18.2
+		"drag" 14.6
 		"heat dissipation" .26
 		"fuel capacity" 600
 		"cargo space" 490
@@ -752,7 +752,7 @@ ship "Bulk Freighter"
 		"required crew" 12
 		"bunks" 21
 		"mass" 1510
-		"drag" 21
+		"drag" 16.8
 		"heat dissipation" .27
 		"fuel capacity" 900
 		"cargo space" 640
@@ -972,7 +972,7 @@ ship "Class C Freighter"
 		"required crew" 18
 		"bunks" 43
 		"mass" 1525
-		"drag" 21
+		"drag" 16.8
 		"heat dissipation" .27
 		"fuel capacity" 900
 		"cargo space" 20
@@ -1154,7 +1154,7 @@ ship "Container Transport"
 		"required crew" 6
 		"bunks" 18
 		"mass" 1525
-		"drag" 26.4
+		"drag" 21.1
 		"heat dissipation" .4
 		"fuel capacity" 600
 		"cargo space" 550
@@ -2074,7 +2074,7 @@ ship "Hauler"
 		"required crew" 3
 		"bunks" 12
 		"mass" 490
-		"drag" 14.7
+		"drag" 9.8
 		"heat dissipation" .43
 		"fuel capacity" 400
 		"cargo space" 130
@@ -2133,7 +2133,7 @@ ship "Hauler II"
 		"required crew" 3
 		"bunks" 12
 		"mass" 640
-		"drag" 16.1
+		"drag" 10.7
 		"heat dissipation" .43
 		"fuel capacity" 400
 		"cargo space" 260
@@ -2194,7 +2194,7 @@ ship "Hauler III"
 		"required crew" 3
 		"bunks" 12
 		"mass" 790
-		"drag" 17.5
+		"drag" 11.6
 		"heat dissipation" .43
 		"fuel capacity" 400
 		"cargo space" 390
@@ -2855,7 +2855,7 @@ ship "Nest"
 		"required crew" 5
 		"bunks" 14
 		"mass" 510
-		"drag" 14.7
+		"drag" 9.8
 		"heat dissipation" .48
 		"fuel capacity" 500
 		"cargo space" 40
@@ -3262,7 +3262,7 @@ ship "Roost"
 		"required crew" 7
 		"bunks" 16
 		"mass" 680
-		"drag" 16.1
+		"drag" 10.7
 		"heat dissipation" .48
 		"fuel capacity" 600
 		"cargo space" 80
@@ -3530,7 +3530,7 @@ ship "Skein"
 		"required crew" 7
 		"bunks" 18
 		"mass" 850
-		"drag" 17.5
+		"drag" 11.6
 		"heat dissipation" .51
 		"fuel capacity" 700
 		"cargo space" 120