Accept the syntax "packagename," that means "exact packagenane only"

slackpkg install libreoffice,
will look for libreoffice only, without match libreoffice-dict and
all other libreoffice-*

slackpkg by default match grep -w packagename pkglist

src/slackpkgplus.sh

@@ -1079,6 +1079,7 @@ if [ "$SLACKPKGPLUS" = "on" ];then
     #
   function givepriority() {
     local DIR
+    local ORIARGUMENT=$ARGUMENT
     local ARGUMENT=$1
     local PKGDATA
     local CPRIORITY
@@ -1091,6 +1092,9 @@ if [ "$SLACKPKGPLUS" = "on" ];then
     unset LINEIDX
     unset PKGINFOS
 
+    [[ "${ORIARGUMENT%,*},*" == "${ORIARGUMENT}" ]]&&[[ "${ARGUMENT}" != "${ORIARGUMENT%,*}" ]]&&return
+    ARGUMENT="${ARGUMENT%,*}"
+
     if [ -z "$TOPROCESS" ];then
       case "$CMD" in
         upgrade-all) TOPROCESS=$(comm -1 -2 ${TMPDIR}/lpkg ${TMPDIR}/dpkg | comm -1 -2 - ${TMPDIR}/spkg|wc -l);;
@@ -2186,6 +2190,7 @@ if [ "$SLACKPKGPLUS" = "on" ];then
     PRIORITYLIST_SX=""
 
     for pref in $INPUTLIST ; do
+      pref=${pref/%,/,*}
       PRIORITY_FILTER_RULE=""
 
       # You can specify 'slackpkg install .' that is an alias of 'slackpkg install dir:./'