mod_auth_mysql 2.20 won't compile with newer Apache and alloc.h vs ap_alloc.h

trying to get Apache to compile with this keeps failing, complaining about "alloc.h" it seems. I notice that apache calls it "ap_alloc.h" now, but the only reference in mod_auth _mysql is in: apMakefile.tmpl: $(INCDIR)/alloc.h $(INCDIR)/buff.h \ but changing that doesn't fix the problem... this has been going on since like apache 1.3.1x and there is no newer mod_auth_mysql that I've found. I fixed this before, but I can't remember what I did. Could you please tell me how to fix this, and then put up a fixed version of mod_auth_mysql so other's don't run into this problem? apache 1.3.19, linux RH6.2, mysql, mod_auth_mysql 2.20: ===> src/modules/auth_mysql make[4]: *** No rule to make target `../../include/alloc.h', needed by `mod_auth_mysql.o'. Stop. make[3]: *** [all] Error 1 make[2]: *** [subdirs] Error 1 make[2]: Leaving directory `/data/usr/src/WT_Apache_Setup/apache_1.3.19/src' make[1]: *** [build-std] Error 2 make[1]: Leaving directory `/data/usr/src/WT_Apache_Setup/apache_1.3.19' make: *** [build] Error 2