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

[HonzaCholasta]

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

PR body:
"""
Replace empty string with a single space in the third argument of
`AC_CHECK_LIB` (`action-if-found`) where applicable.

Empty string in the argument causes `AC_CHECK_LIB` to use the default
action when a library is found which includes adding the library to `LIBS`,
which specifies libraries to be linked in every binary and library in the
project.

This fixes libkrad, liblber, libldap_r and libsss_nss_idmap being linked to
every binary and library in IPA, even where unused.

https://pagure.io/freeipa/issue/6846
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/718/head:pr718
git checkout pr718
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