In manage_sql.c:
  Amended the if clause for the Test if the ssh_credential
  differs from the ssh_elevate_credential in functions
  "create_target(...)" and "modify_target(...)".

…te_credential_different_to_ssh_credential

…ential Test.

…te_credential_different_to_ssh_credential

…ntial Test.

in manage_sql.c:
  Replaced the much to simple, erroneous if statement in function
  modify_target() by a more complex code.

…again.

In manage_sql.c, in function modify_target(...):
  Replaced the code for the check if the ssh_elevate_credential
  differs from the ssh_credential by a new one, that works in
  any case.
  Amended the check if there is a ssh_elevate_credential without
  a ssh_credential.