HP-UX doesn't have hstrerror(), so make our own for that platform
HP-UX doesn't have hstrerror(), so make our own for that platform

Reviewed-by: Rich Salz <c04971a99e5a9ee80eaab4b1deb37e845b0bd697@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2092)
(cherry picked from commit 46766d003666da5f90346da7e6d09e109355f5c6)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl