0d16daa30d
- update got.1 CAVEATS section; prompted by feedback from otto@ - fix assignment to wrong pointer in got_ref_dup() - fix performance on repositories with many references (e.g. freebsd src.git): o implement an object ID map for reference lists o use reflist object id maps in got log, tog log, and tog diff (with naddy) o switch reflist to TAILQ; insert elements more efficiently for sorted input