Merge branch 'svn-fe' of git://repo.or.cz/git/jrn

Merge branch 'svn-fe' of git://repo.or.cz/git/jrn

* 'svn-fe' of git://repo.or.cz/git/jrn:
  vcs-svn: use strchr to find RFC822 delimiter
  vcs-svn: implement perfect hash for top-level keys
  vcs-svn: implement perfect hash for node-prop keys
  vcs-svn: use strbuf for author, UUID, and URL
  vcs-svn: use strbuf for revision log
  vcs-svn: improve reporting of input errors
  vcs-svn: make buffer_copy_bytes return length read
  vcs-svn: make buffer_skip_bytes return length read
  vcs-svn: improve support for reading large files
  vcs-svn: allow input errors to be detected promptly
  vcs-svn: simplify repo_modify_path and repo_copy
  vcs-svn: handle_node: use repo_read_path
  vcs-svn: introduce repo_read_path to check the content at a path