configure: Use pkg-config to look for keyutils
Support for pkg-config was added to keyutils somewhat recently in November 2018, whereas the keyutils dependency was originally added in August 2016 in commit 31ed6f2b.
Edited by Debarshi Ray
Support for pkg-config was added to keyutils somewhat recently in November 2018, whereas the keyutils dependency was originally added in August 2016 in commit 31ed6f2b.