patch 8.2.4001: insert complete code uses global variables

Problem:    Insert complete code uses global variables.
Solution:   Make variables local to the file and use accessor functions.
            (Yegappan Lakshmanan, closes #9470)

src/edit.c

@@ -1280,7 +1280,7 @@ edit(
 	    // but it is under other ^X modes
 	    if (*curbuf->b_p_cpt == NUL
 		    && (ctrl_x_mode_normal() || ctrl_x_mode_whole_line())
-		    && !(compl_cont_status & CONT_LOCAL))
+		    && !compl_status_local())
 		goto normalchar;
 
 docomplete:
@@ -1289,7 +1289,7 @@ edit(
 	    disable_fold_update++;  // don't redraw folds here
 #endif
 	    if (ins_complete(c, TRUE) == FAIL)
-		compl_cont_status = 0;
+		compl_status_clear();
 #ifdef FEAT_FOLDING
 	    disable_fold_update--;
 #endif

src/getchar.c

@@ -2453,7 +2453,7 @@ handle_mapping(
 	    && State != ASKMORE
 	    && State != CONFIRM
 	    && !((ctrl_x_mode_not_default() && at_ctrl_x_key())
-		    || ((compl_cont_status & CONT_LOCAL)
+		    || (compl_status_local()
 			&& (tb_c1 == Ctrl_N || tb_c1 == Ctrl_P))))
     {
 #ifdef FEAT_GUI

src/globals.h

@@ -163,23 +163,6 @@ EXTERN colnr_T	dollar_vcol INIT(= -1);
  * Variables for Insert mode completion.
  */
 
-// Length in bytes of the text being completed (this is deleted to be replaced
-// by the match.)
-EXTERN int	compl_length INIT(= 0);
-
-// List of flags for method of completion.
-EXTERN int	compl_cont_status INIT(= 0);
-# define CONT_ADDING	1	// "normal" or "adding" expansion
-# define CONT_INTRPT	(2 + 4)	// a ^X interrupted the current expansion
-				// it's set only iff N_ADDS is set
-# define CONT_N_ADDS	4	// next ^X<> will add-new or expand-current
-# define CONT_S_IPOS	8	// next ^X<> will set initial_pos?
-				// if so, word-wise-expansion will set SOL
-# define CONT_SOL	16	// pattern includes start of line, just for
-				// word-wise expansion, not set for ^X^L
-# define CONT_LOCAL	32	// for ctrl_x_mode 0, ^X^P/^X^N do a local
-				// expansion, (eg use complete=.)
-
 EXTERN char_u	*edit_submode INIT(= NULL); // msg for CTRL-X submode
 EXTERN char_u	*edit_submode_pre INIT(= NULL); // prepended to edit_submode
 EXTERN char_u	*edit_submode_extra INIT(= NULL);// appended to edit_submode