configurable boost fastor during braking

src/main/fc/settings.yaml

@@ -1247,6 +1247,10 @@ groups:
         field: mc.braking_speed_threshold
         min: 0
         max: 1000      
+      - name: nav_mc_braking_boost_factor
+        field: mc.braking_boost_factor
+        min: 0
+        max: 200
 
       - name: nav_fw_cruise_thr
         field: fw.cruise_throttle

src/main/navigation/navigation.c

@@ -117,6 +117,7 @@ PG_RESET_TEMPLATE(navConfig_t, navConfig,
         .hover_throttle = 1500,
         .auto_disarm_delay = 2000,
         .braking_speed_threshold = 100,
+        .braking_boost_factor = 0,
     },
 
     // Fixed wing

src/main/navigation/navigation.h

@@ -142,6 +142,7 @@ typedef struct navConfig_s {
         uint16_t hover_throttle;             // multicopter hover throttle
         uint16_t auto_disarm_delay;          // multicopter safety delay for landing detector
         uint16_t braking_speed_threshold;    // above this speed braking routine might kick in
+        uint8_t  braking_boost_factor;
     } mc;
 
     struct {