This new implementation is based on the conflict walk we implemented in the 'svn' command l…
Reintroduce the svn_client_conflict_walk() API.This new implementation is based on the conflict walk we implemented inthe 'svn' command line client. The command line client now relies on theclient library to walk conflicts in the working copy.This avoids forcing other clients to reimplement the status walk logic whichis rather complex since it needs to handle new tree conflicts which may appearwhen another tree conflict gets resolved. It should make the transtion to thenew conflict API easier for third party clients since the new resolver can nowbe invoked in a similar way to the old libsvn_wc conflict handler.Suggested by: ivan(during the October 2016 hackathon in Berlin)* subversion/include/svn_client.h (svn_client_conflict_walk_func_t, svn_client_conflict_walk): Declare.* subversion/libsvn_client/conflicts.c (conflict_status_walker_baton, tree_conflict_collector, handle_tree_conflict_resolution_failure, conflict_status_walker, svn_client_conflict_walk): New implementation of a conflict status walker. Based on, and very similar to, code from svn/resolve-cmd.c.* subversion/svn/cl.h, subversion/svn/conflict-callbacks.c (svn_cl__resolve_conflict): Remove now unused output paramer 'resolved', and redundant parameter config (ctx->config can be used instead).* subversion/svn/resolve-cmd.c (conflict_status_walker_baton): Replace with... (conflict_walker_baton): ... this, which contains only a subset of the fields. (tree_conflict_collector, handle_tree_conflict_resolution_failure, conflict_status_walker, walk_conflicts): Remove. (conflict_walker): A callback for the new conflict walker. (svn_cl__walk_conflicts): Use the new conflict walker provided by the libsvn_client library instead of the previous inline implementation.