patch 8.1.1892: missing index entry and option menu for 'completepopup'

Problem:    Missing index entry and option menu for 'completepopup'.
Solution:   Add the entries.  Adjust #ifdefs to avoid dead code.
diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index bf3e346..90e76f2 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -1,4 +1,4 @@
-*quickref.txt*  For Vim version 8.1.  Last change: 2019 Aug 01
+*quickref.txt*  For Vim version 8.1.  Last change: 2019 Aug 20
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -651,6 +651,7 @@
 'complete'	  'cpt'     specify how Insert mode completion works
 'completefunc'	  'cfu'     function to be used for Insert mode completion
 'completeopt'	  'cot'     options for Insert mode completion
+'completepopup'	  'cpp'     options for the Insert mode completion info popup
 'completeslash'	  'csl'	    like 'shellslash' for completion
 'concealcursor'	  'cocu'    whether concealable text is hidden in cursor line
 'conceallevel'	  'cole'    whether concealable text is shown or hidden
diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index eec2d1e..7d3a880 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -1,7 +1,7 @@
 " These commands create the option window.
 "
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2019 Aug 01
+" Last Change:	2019 Aug 20
 
 " If there already is an option window, jump to that one.
 let buf = bufnr('option-window')
@@ -806,6 +806,10 @@
   call <SID>OptionL("cpt")
   call append("$", "completeopt\twhether to use a popup menu for Insert mode completion")
   call <SID>OptionG("cot", &cot)
+  if exists("+completepopup")
+    call append("$", "completepopup\toptions for the Insert mode completion info popup")
+    call <SID>OptionG("cpp", &cpp)
+  endif
   call append("$", "pumheight\tmaximum height of the popup menu")
   call <SID>OptionG("ph", &ph)
   call append("$", "pumwidth\tminimum width of the popup menu")
diff --git a/src/option.c b/src/option.c
index 69d2727..8d9b578 100644
--- a/src/option.c
+++ b/src/option.c
@@ -894,7 +894,7 @@
 #endif
 			    SCTX_INIT},
     {"completepopup", "cpp", P_STRING|P_VI_DEF|P_COMMA|P_NODUP,
-#ifdef FEAT_TEXT_PROP
+#if defined(FEAT_TEXT_PROP) && defined(FEAT_QUICKFIX)
 			    (char_u *)&p_cpp, PV_NONE,
 			    {(char_u *)"", (char_u *)0L}
 #else
@@ -7830,12 +7830,14 @@
 	if (parse_previewpopup(NULL) == FAIL)
 	    errmsg = e_invarg;
     }
+# ifdef FEAT_QUICKFIX
     // 'completepopup'
     else if (varp == &p_cpp)
     {
 	if (parse_completepopup(NULL) == FAIL)
 	    errmsg = e_invarg;
     }
+# endif
 #endif
 
     /* Options that are a list of flags. */
diff --git a/src/option.h b/src/option.h
index 0461a64..0ccf8f1 100644
--- a/src/option.h
+++ b/src/option.h
@@ -503,7 +503,9 @@
 #endif
 EXTERN int	p_gd;		// 'gdefault'
 #ifdef FEAT_TEXT_PROP
+# ifdef FEAT_QUICKFIX
 EXTERN char_u	*p_cpp;		// 'completepopup'
+# endif
 EXTERN char_u	*p_pvp;		// 'previewpopup'
 #endif
 #ifdef FEAT_PRINTER
diff --git a/src/popupwin.c b/src/popupwin.c
index a892bb6..99a40af 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -1294,9 +1294,13 @@
     static int
 parse_popup_option(win_T *wp, int is_preview)
 {
-    char_u *p;
+    char_u *p =
+#ifdef FEAT_QUICKFIX
+	!is_preview ? p_cpp :
+#endif
+	p_pvp;
 
-    for (p = is_preview ? p_pvp : p_cpp; *p != NUL; p += (*p == ',' ? 1 : 0))
+    for ( ; *p != NUL; p += (*p == ',' ? 1 : 0))
     {
 	char_u	*e, *dig;
 	char_u	*s = p;
@@ -1674,6 +1678,7 @@
 	parse_previewpopup(wp);
 	popup_set_wantpos_cursor(wp, wp->w_minwidth);
     }
+# ifdef FEAT_QUICKFIX
     if (type == TYPE_INFO)
     {
 	wp->w_popup_pos = POPPOS_TOPLEFT;
@@ -1682,6 +1687,7 @@
 	add_border_left_right_padding(wp);
 	parse_completepopup(wp);
     }
+# endif
 
     for (i = 0; i < 4; ++i)
 	VIM_CLEAR(wp->w_border_highlight[i]);
@@ -3257,6 +3263,7 @@
     return wp->w_popup_flags != 0;
 }
 
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
 /*
  * Find an existing popup used as the info window, in the current tab page.
  * Return NULL if not found.
@@ -3272,6 +3279,7 @@
 	    return wp;
     return NULL;
 }
+#endif
 
     void
 f_popup_getpreview(typval_T *argvars UNUSED, typval_T *rettv)
@@ -3314,6 +3322,7 @@
     return OK;
 }
 
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
     void
 popup_close_preview(int info)
 {
@@ -3328,6 +3337,7 @@
 	popup_close_and_callback(wp, &res);
     }
 }
+#endif
 
 /*
  * Set the title of the popup window to the file name.
diff --git a/src/version.c b/src/version.c
index 895b4ff..5d802fd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -766,6 +766,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1892,
+/**/
     1891,
 /**/
     1890,