ESR did not take nagini-fighter.png into account for renaming it to

fighter+female.png. Fixing this.

* Rename image file.

* Fix wmllint rule.

* Fix relevant mainline references.

data/core/units/nagas/Fighter.cfg

@@ -76,6 +76,6 @@
     [female]
         name= _ "Nagini Fighter"
         gender=female
-        profile=portraits/nagas/nagini-fighter.png
+        profile="portraits/nagas/fighter+female.png"
     [/female]
 [/unit_type]

data/core/units/nagas/Myrmidon.cfg

@@ -69,7 +69,7 @@
         gender=female
         image="units/nagas/myrmidon+female.png"
         description= _ "The most practiced of the nagani blademasters are initiated into the caste of the Myrmidon, masters of their twin-bladed art. They strike as fast as the snakes which they resemble, and dance away from attacks with grace. Not only are they potent enemies on any open terrain, but their ability to swim allows them a deadly mobility."
-        profile=portraits/nagas/nagini-fighter.png
+        profile="portraits/nagas/fighter+female.png"
         {DEFENSE_ANIM "units/nagas/myrmidon+female-defend.png" "units/nagas/myrmidon+female.png" {SOUND_LIST:NAGA_HIT} }
         [attack_anim]
             [filter_attack]

data/core/units/nagas/Warrior.cfg

@@ -80,6 +80,6 @@
         name= _ "Nagini Warrior"
         gender=female
         description= _ "Many of the young warriors of the nagani aspire for the day when they merit their second blade. Their martial practice of using twin blades is wholly unlike that of the Orcs and other races, for they have begun to learn the art of using their serpentine form to best effect, twisting and turning to dodge from blows. This makes them potent on land, but the friction of water greatly impedes their ability to do this."
-        profile=portraits/nagas/nagini-fighter.png
+        profile="portraits/nagas/fighter+female.png"
     [/female]
 [/unit_type]

data/tools/wmllint

@@ -165,7 +165,7 @@ linechanges = (
         ("portraits/Alex_Jarocha-Ernst/naga-fighter.png",
          "portraits/nagas/fighter.png"),
         ("portraits/Alex_Jarocha-Ernst/nagini-fighter.png",
-         "portraits/nagas/nagini-fighter.png"),
+         "portraits/nagas/fighter+female.png"),
         ("portraits/Alex_Jarocha-Ernst/orcish-assassin.png",
          "portraits/orcs/assassin.png"),
         ("portraits/Emilien_Rotival/human-general.png",