Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r229742: sh: Avoid possible echo options in a testcase.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Embellish this testcase a little bit to be more clear what the output is
and why. The first case is correct usage which has but one correct output.
The 2nd and 3rd cases are incorrect usage in which the exact output is
not standardized and various shells give various allowable output.

Add a test case for options.c revision 1.26.