Merge: r272649
 use calloc in get_line() when allocating line to ensure it is fully initialized,
 fixes a later uninitialized value in copy_param() (FreeBSD #193499).

PR: 193499
Submitted by: Thomas E. Dickey  <tom@invisible-island.net>
Merge: 272655

Import byacc 20141005 from vendor
Merge: r272769

Import byacc 20141006

PR: 193499