[Freeipa-devel] [freeipa PR#718][comment] configure: fix AC_CHECK_LIB usage

[HonzaCholasta]

  URL: https://github.com/freeipa/freeipa/pull/718
Title: #718: configure: fix AC_CHECK_LIB usage

HonzaCholasta commented:
"""
`info autoconf Libraries` says:
> If ACTION-IF-FOUND is not
> specified, the default action prepends `-lLIBRARY' to `LIBS' and
> defines `HAVE_LIBLIBRARY' (in all capitals).

It does not explicitly say what constitutes an unspecified value though.
"""

See the full comment at https://github.com/freeipa/freeipa/pull/718#issuecomment-294825956