libwww, HTAAUtil.h changes

Hello,

I have read this change history: http://www.w3.org/Library/User/History.html
.
I have a piece of code which uses HTAAUtil.h and specifically needs this
section of HTAAUtil.h

typedef enum {
    HTAA_UNKNOWN,
    HTAA_NONE,
    HTAA_BASIC,
    HTAA_PUBKEY,
    HTAA_KERBEROS_V4,
    HTAA_KERBEROS_V5,
    HTAA_MAX_SCHEMES                            /* THIS MUST ALWAYS BE LAST!
*/
} HTAAScheme;

There is no mention of removing it or anything on that url. I searched the
source and it should be mentioned in change log of "Release 4.1b1 May 20
1996" as it exists in "Release 4.0D February 12 1996".

The software is an old www-browser (Mosaic) which i am trying to make little
more closer to modern standards.
I need to know what were these used for inside libwww and how are they
replaced.

Thank you.


-Mikko Kortelainen