Import upstream patch 20191012

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).