krb5: show error message for krb5_init_context() failures
If there are typos in /etc/krb5.conf (or one of the included config
snippets) krb5_init_context(), the initial call always needed to do any
other operation with libkrb5, fails because /etc/krb5.conf cannot be
Currently the related debug/syslog messages might be misleading, e.g.
failed to read keytab. This is because SSSD does not use a global krb5
context but creates a fresh one for every new request or operation (to
always use the latest settings from /etc/krb5.conf) and typically there
is an error message indicating that the related operation failed but not
giving more details.
Since krb5_init_context() is fundamental for Kerberos support this patch
tries to add as much details as libkrb5 provides in the logs if the call
Reviewed-by: Lukáš Slebodník <email@example.com>
Reviewed-by: Robbie Harwood <firstname.lastname@example.org>
(cherry picked from commit 2c10819750a8d920ab755eba1278e6e20e684e93)
(cherry picked from commit dbe54141c36006809cc5fcf9ad729405c0a9292c)