Allow user bigbluebutton to delete recordings

This patch modifies `bbb-record` allowing the user `bigbluebutton` to
delete recordings. The user has all necessary access rights, meaning
that the deletion works without a problem and the check for root does
not protect anything. The users owns the data after all. The current
check just makes things less convenient.

bigbluebutton-config/bin/bbb-record

@@ -112,6 +112,13 @@ need_root() {
         fi
 }
 
+need_root_or_bigbluebutton() {
+	if [ $EUID != 0 -a "$USER" != 'bigbluebutton']; then
+		echo "Need to be user root or bigbluebutton to run this option"
+      exit 1
+   fi
+}
+
 print_header() {
         if [ ! $HEADER ]; then
                 echo
@@ -212,7 +219,7 @@ while [ $# -gt 0 ]; do
         fi
 		
 	if [ "$1" = "-delete" -o "$1" = "--delete" ]; then
-                need_root
+                need_root_or_bigbluebutton
                 if [ ! -z "${2}" ]; then
                         MEETING_ID="${2}"
                         shift