Partial fix for Issue #443: post-commit hook script (error) output lost Includes post-commit hook stderr propagation for ra_dav This is step 1 : Introduction of svn_client_commit_info2_t and its constructor. * subversion/include/svn_client.h (svn_client_commit_info2_t): New structure to take care of post-commit-hook's stderr. (svn_client_create_commit_info): New fuction. Constructor for svn_client_commit_info2_t. * subversion/libsvn_client/commit.c (svn_client_create_commit_info): New function.