[TICKET #1212] Add maintainer scripts to create alternatives

sflphone-client-gnome/debian/postinst

+#!/bin/sh -e
+
+update-alternatives --install /usr/bin/sflphone sflphone /usr/bin/sflphone-client-gnome 100 \
+                    --slave /usr/share/man/man1/sflphone.1.gz sflphone.1.gz \
+                            /usr/share/man/man1/sflphone-client-gnome.1.gz
+
+exit 0

sflphone-client-gnome/debian/prerm

+#!/bin/sh -e
+
+
+if [ "$1" = "remove" ]; then
+    # Remove alternatives symlink set in postinst
+    update-alternatives --remove sflphone /usr/bin/sflphone
+fi