ChangeLog, e2fsck.8.in, e2fsck.h, pass5.c, unix.c:

ChangeLog, e2fsck.8.in, e2fsck.h, pass5.c, unix.c:
  unix.c (PRS): Added new option -C, which causes e2fsck to print
  	progress updates so that callers can keep track of the completion
  	progress of e2fsck.  Designed for use by progress, except for -C 0,
  	which prints a spinning report which may be useful for some users.
  pass5.c (e2fsck_pass5): Use a finer-grained progress reporting scheme
  	(useful for larger filesystems).
  e2fsck.h: Add progress_fd and progress_pos, for use by the Unix
  	progress reporting functions.