Fix scripts using gawk and wget

buildroot/bin/use_example_configs

 #!/usr/bin/env bash
 
 IFS=: read -r PART1 PART2 <<< "$@"
-[ -n "${PART2}" ] && { REPO="$PART1" ; RDIR="$PART2" ; } \
-                  || { REPO=bugfix-2.0.x   ; RDIR="$PART1" ; }
+[ -n "${PART2}" ] && { REPO="$PART1" ; RDIR="${PART2// /%20}" ; } \
+                  || { REPO=bugfix-2.0.x   ; RDIR="${PART1// /%20}" ; }
 EXAMPLES="https://raw.githubusercontent.com/MarlinFirmware/Configurations/$REPO/config/examples"
 
+which curl >/dev/null && TOOL='curl -L -s -S -f -o wgot'
+which wget >/dev/null && TOOL='wget -q -O wgot'
+
 restore_configs
 
 cd Marlin
 
-wget -q "$EXAMPLES/$RDIR/Configuration.h"     -O wgot && mv wgot Configuration.h
-wget -q "$EXAMPLES/$RDIR/Configuration_adv.h" -O wgot && mv wgot Configuration_adv.h
-wget -q "$EXAMPLES/$RDIR/_Bootscreen.h"       -O wgot && mv wgot _Bootscreen.h
-wget -q "$EXAMPLES/$RDIR/_Statusscreen.h"     -O wgot && mv wgot _Statusscreen.h
-rm -f wgot
+$TOOL "$EXAMPLES/$RDIR/Configuration.h"     >/dev/null 2>&1 && mv wgot Configuration.h
+$TOOL "$EXAMPLES/$RDIR/Configuration_adv.h" >/dev/null 2>&1 && mv wgot Configuration.h
+$TOOL "$EXAMPLES/$RDIR/_Bootscreen.h"       >/dev/null 2>&1 && mv wgot Configuration.h
+$TOOL "$EXAMPLES/$RDIR/_Statusscreen.h"     >/dev/null 2>&1 && mv wgot Configuration.h
 
+rm -f wgot
 cd - >/dev/null

buildroot/share/fonts/uxggenpages.sh

 }
 EOF
 
+which awk  >/dev/null && AWK=awk
+which gawk >/dev/null && AWK=gawk
+
 grep -Hrn _UxGT . | grep '"' \
   | sed 's/_UxGT("/\n&/g;s/[^\n]*\n_UxGT("\([^"]*\)[^\n]*/\1 /g;s/.$//' \
   | ${EXEC_GENPAGES} \
   | sort -k 1n -k 2n | uniq \
-  | gawk -v EXEC_PREFIX=${DN_EXEC} -f "proc.awk" \
+  | "$AWK" -v EXEC_PREFIX=${DN_EXEC} -f "proc.awk" \
   | while read PAGE BEGIN END UTF8BEGIN UTF8END; do \
     if [ ! -f ${DN_DATA}/fontpage_${PAGE}_${BEGIN}_${END}.h ]; then \
       ${EXEC_BDF2U8G} -u ${PAGE} -b ${BEGIN} -e ${END} ${FN_FONT} fontpage_${PAGE}_${BEGIN}_${END} ${DN_DATA}/fontpage_${PAGE}_${BEGIN}_${END}.h > /dev/null 2>&1 ;

buildroot/share/git/ghtp

   -[Hh]) TYPE=HTTPS ; MATCH="git@" ; FORMULA="$GH_SSH/$GH_HTTPS" ;;
   -[Ss]) TYPE=SSH ; MATCH="https:" ; FORMULA="$GH_HTTPS/$GH_SSH" ;;
   *)
-    echo "usage: `basename $0` -h | -s" 1>&2
+    echo "Usage: `basename $0` -h | -s" 1>&2
     echo -e " \e[0;92m-h\e[0m to switch to HTTPS" 1>&2
     echo -e " \e[0;92m-s\e[0m to switch to SSH" 1>&2
     exit 1
     ;;
 esac
 
-REMOTES=$(git remote -v | egrep "\t$MATCH" | gawk '{print $1 " " $2}' | sort -u | sed "s/$FORMULA/")
+which awk  >/dev/null && AWK=awk
+which gawk >/dev/null && AWK=gawk
+
+REMOTES=$(git remote -v | egrep "\t$MATCH" | "$AWK" '{print $1 " " $2}' | sort -u | sed  "s/$FORMULA/")
 
 if [[ -z $REMOTES ]]; then
   echo "Nothing to do." ; exit
 echo "$REMOTES" | xargs -n2 git remote set-url
 
 echo -n "Remotes set to $TYPE: "
-echo "$REMOTES" | gawk '{printf "%s ", $1}'
+echo "$REMOTES" | "$AWK" '{printf "%s ", $1}'
 echo

buildroot/share/git/mfclean

 # Great way to clean up your branches after messing around a lot
 #
 
+which awk  >/dev/null && AWK=awk
+which gawk >/dev/null && AWK=gawk
+
 KEEP="RC|RCBugFix|dev|master|bugfix-1|bugfix-2"
 
 echo "Fetching latest upstream and origin..."
 echo
 
 echo "Pruning Remotely-deleted Branches..."
-git branch -vv | egrep -v "^\*|$KEEP" | grep ': gone]' | gawk '{print $1}' | xargs -n 1 git branch -D
+git branch -vv | egrep -v "^\*|$KEEP" | grep ': gone]' | "$AWK" '{print $1}' | xargs -n 1 git branch -D
 echo
 
 # List fork branches that don't match local branches