- Add ncurses patch 20191019
+ modify make_hash to not require --disable-leaks, to simplify building
with address-sanitizer.
+ modify tic to exit if it cannot remove a conflicting name, because
treating that as a partial success can cause an infinite loop in
use-resolution (report/testcase by Hongxu Chen, cf: 20111001).

- Add ncurses patch 20191015
+ improve buffer-checks in captoinfo.c, for some cases when the
input string is shorter than expected.
> fix two errata in tic (report/testcases by Hongxu Chen):
+ check for missing character after backslash in write_it
+ check for missing characters after "%>" when converting from termcap
syntax (cf: 980530).

- Avoid recursion trouble in spec file cause by undefined _lto_cflags

- Add ncurses patch 20191012
+ amend recent changes to ncurses*-config and pc-files to filter out
Debian linker-flags (report by Sven Joachim, cf: 20150516).
+ clarify relationship between tic, infocmp and captoinfo in manpage.
+ check for invalid hashcode in _nc_find_type_entry and
_nc_find_name_entry.
> fix several errata in tic (reports/testcases by "zjuchenyuan"):
+ check for invalid hashcode in _nc_find_entry.
+ check for missing character after backslash in fmt_entry
+ check for acsc with odd length in dump_entry in check for one-one
mapping (cf: 20060415);
+ check length when converting from old AIX box_chars_1 capability,
overlooked in changes to eliminate strcpy (cf: 20001007).