Sort rewrite to be SUSv3 compliant.  New config option, updated help, and
a couple of infrastructure bits.
diff --git a/libbb/get_line_from_file.c b/libbb/get_line_from_file.c
index 6d12b21..a27edc3 100644
--- a/libbb/get_line_from_file.c
+++ b/libbb/get_line_from_file.c
@@ -44,7 +44,8 @@
 			linebuf = xrealloc(linebuf, linebufsz += GROWBY);
 		}
 		linebuf[idx++] = (char)ch;
-		if (ch == '\n' || ch == '\0') {
+		if (!ch) return linebuf;
+		if (c<2 && ch == '\n') {
 			if (c) {
 				--idx;
 			}
@@ -71,6 +72,11 @@
 	return private_get_line_from_file(file, 1);
 }
 
+extern char *bb_get_chunk_from_file(FILE *file)
+{
+	return private_get_line_from_file(file, 2);
+}
+
 
 /* END CODE */
 /*