* lisp/ob-sh.el (org-babel-variable-assignments:sh): Check for
":hlines yes" and use header arg :hlines-string if
defined (default to "hline") and add this to the call of
`org-babel-sh-var-to-sh'.
(org-babel-sh-var-to-sh, org-babel-sh-var-to-string): Add additional
optional string argument `hline' and use it for the :hline parameter
in the call to `orgtbl-to-generic'.
* lisp/ob-shell.el (org-babel-execute:shell): Pass the cmdline header
argument to `org-babel-sh-evaluate'.
(org-babel-sh-evaluate): Pass the cmdline header argument to
`call-process-shell-command'.
Achim Gratz
Eric Schulte
Bastien Guerry