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Description of problem:
httpd is not able to start when mod_session is configured to use mod_session_crypto

Version-Release number of selected component (if applicable):
mod_session-2.4.6-80.el7_5.1

How reproducible:
always

Steps to Reproduce:
1. install mod_session
2. uncomment loading of mod_session_crypto in module config (/etc/httpd/conf.modules.d/01-session.conf)
3. start httpd

Actual results:
systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
kill[3455]: kill: cannot find process ""
systemd[1]: httpd.service: control process exited, code=exited status=1
systemd[1]: Failed to start The Apache HTTP Server.
systemd[1]: Unit httpd.service entered failed state.

httpd error_log:
[session_crypto:error] [pid 19768] (20019)DSO load failed: AH01845: The crypto library 'openssl' could not be loaded: /usr/lib64/apr-util-1/apr_crypto_openssl-1.so: cannot open shared object file: No such file or directory (apr_crypto_openssl-1.so: 0)

Expected results:
successful start of httpd

Additional info:
Installing apr-util-openssl fix this.

The API design in apr-util is poor here.  Probably mod_session should Requires: apr-util-openssl, though

https://src.fedoraproject.org/rpms/apr-util/c/7def96255723f89df0831670d8bd9a6be5a979c3

is better/simpler than tracking each API consumer for the future.

This is now affecting RHEL 7.6 production systems. We cannot enforce the RHEL 7 STIG without mod_session, and httpd will not start with apr-util-openssl missing.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2020:1121