fix some bashisms

bin/epm-addrepo

@@ -192,7 +192,7 @@ __epm_addrepo_altlinux()
 {
     local repo="$*"
 
-    if [ -z "$repo" ] || [ "$repo" == "-h" ] || [ "$repo" == "--list" ] || [ "$repo" == "--help" ] ; then
+    if [ -z "$repo" ] || [ "$repo" = "-h" ] || [ "$repo" = "--list" ] || [ "$repo" = "--help" ] ; then
         __epm_addrepo_altlinux_help
         return
     fi

bin/epm-prescription

@@ -33,7 +33,7 @@ EOF
     exit
 fi
 
-if [ "$1" == "--list-all" ] || [ -z "$*" ] ; then
+if [ "$1" = "--list-all" ] || [ -z "$*" ] ; then
     [ -n "$short" ] || [ -n "$quiet" ] || echo "Run with a name of a prescription to run:"
     __epm_play_list $psdir
     exit

bin/epm-release_upgrade

@@ -113,7 +113,7 @@ get_fix_release_pkg()
     local TOINSTALL=''
 
     local FORCE=''
-    if [ "$1" == "--force" ] ; then
+    if [ "$1" = "--force" ] ; then
         FORCE="$1"
         shift
     fi
@@ -129,7 +129,7 @@ get_fix_release_pkg()
         epm installed apt-conf-branch && echo "apt-conf-branch apt-conf-sisyphus-"
     fi
 
-    if [ "$FORCE" == "--force" ] ; then
+    if [ "$FORCE" = "--force" ] ; then
         # assure we have set needed release
         TOINSTALL="altlinux-release-$TO"
     else