Made generation of floating energy parameters enpara file during

starting density generation optional.

Iff no enpara file was present this automatic enpara generation was
triggered. It now only is triggered iff the command line switch
"-genEnpara" is set. Otherwise there is a fallback to an internal main
quantum numbers enpara file.

optional/stden.f90

@@ -30,6 +30,7 @@
           USE m_types
           USE m_cylpts
           USE m_points
+          USE m_juDFT_init
           IMPLICIT NONE
           !     ..
           TYPE(t_mpi),INTENT(IN)      :: mpi
@@ -300,7 +301,7 @@
              !
              ! set up parameters for enpara-file
              !
-             IF (.NOT.l_enpara) THEN
+             IF (juDFT_was_argument("-genEnpara").AND..NOT.l_enpara) THEN
                 OPEN (40,file='enpara',form='formatted',status='unknown')
                 enpara%lchange = .TRUE.
                 enpara%llochg = .TRUE.