Revision 1492168

Implement '--log' option for 'svn mergeinfo --show-revs' subcommand to print 
revisions log message, author and date.

Suggested by: lgo

* subversion/svn/cl.h
  (svn_cl__opt_state_t): Add mergeinfo_log member.

* subversion/svn/mergeinfo-cmd.c
  (): Include svn_compat.h and svn_props.h.
  (SEP_STRING, print_log_details): New.
  (mergeinfo_log): New, mostly extracted from svn_cl__mergeinfo().
  (svn_cl__mergeinfo): Call mergeinfo_log().

* subversion/svn/svn.c
  (svn_cl__longopt_t): Add opt_mergeinfo_log.
  (svn_cl__options): Add description for '--log' option.
  (svn_cl__cmd_table): Add opt_mergeinfo_log to mergeinfo subcommand.
  (sub_main): Handle '--log' option. 

* subversion/tests/cmdline/mergeinfo_tests.py
  (mergeinfo_log): New test.
  (test_list): Add mergeinfo_log.