Mozilla NSS/NSPR has deprecated "key.h"
For whatever reason, Mozilla NSS/NSPR has apparently deprecated the
key.h header file (i.e.,
/usr/include/mps/key.h). This deprecated notice was posted as a comment in the header in the past, so there was no particular way to notice. In more recent versions of the library, a pragma message is used which emits noise from the build.
key.h file just includes
keyhi.h, so while this seems to have been completely unnecessary we should just change all of our includes to reflect the new name.