Cdb: Add support for cdb64

Summary

cdb: Download To download and unpack the latest version of cdb: wget -m https://cdb.cr.yp.to/cdb-latest-version.txt version=$(cat cdb.cr.yp.to/cdb-latest-version.txt) wget -m https://cdb.cr.yp.to/cdb-$version.tar.gz tar -xzf cdb.cr.yp.to/cdb-$version.tar.gz cd cdb-$version Then install and test. Archives and changelog (reverse chronological) cdb-20251021.tar.gz browse Add support for cdb64 (at least on 64-bit platforms). Support ./configure, ./configure --prefix=..., and make install. Switch almost all internal integers to num, defined as long long. Replace various uint32, fmt, scan functions with num functions. For tests, avoid depending on csh; depend on ulimit instead of softlimit; increase limit to handle current process bloat. Split buffer interface into inbuf and outbuf. Clean up hier interface. Remove various function definitions and declarations not used in cdb. Eliminate some wrappers: str_len, alloc, uint32, exit, error, systype. Tweak code to avoid deprecated C features (old-style function definitions, empty prototypes, old-style main definitions). Make more use of const and static. Eliminate register. Add -Wall to compiler options. Tweak code to avoid -Wall complaints. Add some don't-be-stupid compiler options: -fwrapv, -fno-delete-null-pointer-checks, -fno-strict-aliasing, and -fno-strict-overflow. Many updates to documentation. cdb-0.75.tar.gz (20000219) browse Fixed bug pointed out by Uwe Ohse: cdb_make_addbegin didn't explicitly return 0, so database creation could fail on systems that didn't follow the traditional C return behavior. Added testzero to regression-test suite. Increased bspace in cdb_make.h from 1024 to 8192. Switched cdbmake to use PUTC and GETC; 3x speedup in one test. UI: posplus sets ENOMEM if it passes 4GB. cdb-0.70.tar.gz (20000217) browse API: rewrote almost everything from scratch. Thanks to Ken Lalonde for suggesting mmap. UI: cdbget supports skip. cdb-0.55.tar.gz (19960922) browse First release.Version: This is version 2025.10...