e2fsck: add the max_count_problems setting in e2fsck.conf

Also add appropriate documentation for options/max_count_problems and
problems/0xXXXXXX/max_count settings in /etc/e2fsck.conf

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index 7d5b10d..06eb179 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -1824,6 +1824,9 @@
 		reconfigure_bool(ctx, ptr, key, PR_NO_NOMSG, "no_nomsg");
 		reconfigure_bool(ctx, ptr, key, PR_PREEN_NOHDR, "preen_noheader");
 		reconfigure_bool(ctx, ptr, key, PR_FORCE_NO, "force_no");
+		profile_get_integer(ctx->profile, "options",
+				    "max_count_problems", 0, 0,
+				    &ptr->max_count);
 		profile_get_integer(ctx->profile, "problems", key, "max_count",
 				    ptr->max_count, &ptr->max_count);