Recommended update for ksh

This update for ksh fixes the following issues:

- Own the ksh files in /etc/alternatives. (bsc#987362, bsc#962069)
- Fix leak in optimize processing. (bsc#982423)
- Fix editor prediction code garbling input. (bsc#964966)

This update was imported from the SUSE:SLE-12:Update update project.

Fixed bugs
bnc#982423
Memory leak in ksh script
bnc#987362
After upgrade to ksh-93vu-12.1.x86_64.rpm alternative files are missing
bnc#964966
ksh command line handling garbles input
bnc#962069
ksh not symlinked
Selected Binaries
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