tests/test-push-http.out

findrenames: Optimise "addremove -s100" by matching files by their SHA1 hashes.

We speed up 'findrenames' for the usecase when a user specifies they
want a similarity of 100% by matching files by their exact SHA1 hash
value. This reduces the number of comparisons required to find exact
matches from O(n^2) to O(n).

While it would be nice if we could just use mercurial's pre-calculated
SHA1 hash for existing files, this hash includes the file's ancestor
information making it unsuitable for our purposes. Instead, we calculate
the hash of old content from scratch.

The following benchmarks were taken on the current head of crew:

addremove 100% similarity:
  rm -rf *; hg up -C; mv tests tests.new
  hg --time addremove -s100 --dry-run

  before:  real 176.350 secs (user 128.890+0.000 sys 47.430+0.000)
  after:   real   2.130 secs (user   1.890+0.000 sys  0.240+0.000)

addremove 75% similarity:
  rm -rf *; hg up -C; mv tests tests.new; \
      for i in tests.new/*; do echo x >> $i; done
  hg --time addremove -s75  --dry-run

  before: real 264.560 secs (user 215.130+0.000 sys 49.410+0.000)
  after:  real 218.710 secs (user 172.790+0.000 sys 45.870+0.000)

adding a
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% expect ssl error
pushing to http://localhost:$HGPORT/
searching for changes
remote: ssl required
% serve errors
% expect authorization error
abort: authorization failed
pushing to http://localhost:$HGPORT/
searching for changes
% serve errors
% expect authorization error: must have authorized user
abort: authorization failed
pushing to http://localhost:$HGPORT/
searching for changes
% serve errors
% expect success
pushing to http://localhost:$HGPORT/
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files
% serve errors
changegroup hook: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872 HG_SOURCE=serve HG_URL=remote:http 
rolling back to revision 1 (undo serve)
% expect authorization error: all users denied
abort: authorization failed
pushing to http://localhost:$HGPORT/
searching for changes
% serve errors
% expect authorization error: some users denied, users must be authenticated
abort: authorization failed
pushing to http://localhost:$HGPORT/
searching for changes
% serve errors