docs: mark some rebindable function names as deprecated

doc/man/nanorc.5

@@ -413,6 +413,7 @@ a string in the current list in the file browser.
 .TP
 .B searchagain
 Repeats the last search command without prompting.
+(The form 'research' is deprecated.)
 .TP
 .B findprevious
 As \fBsearchagain\fR, but always in the backward direction.
@@ -447,6 +448,7 @@ Cuts all text from the cursor position till the end of the buffer.
 .TP
 .B curpos
 Shows the current cursor position: the line, column, and character positions.
+(The form 'cursorpos' is deprecated.)
 .TP
 .B wordcount
 Counts the number of words, lines and characters in the current buffer.
@@ -579,6 +581,7 @@ Toggles case sensitivity in searching (search/replace menus only).
 .TP
 .B regexp
 Toggles whether searching/replacing is based on literal strings or regular expressions.
+(The form 'regex' is deprecated.)
 .TP
 .B backwards
 Toggles whether searching/replacing goes forward or backward.
@@ -591,6 +594,7 @@ Shows the next history entry in the prompt menus (e.g. search).
 .TP
 .B flipreplace
 Toggles between searching for something and replacing something.
+(The form 'dontreplace' is deprecated.)
 .TP
 .B flipexecute
 Toggles between inserting a file and executing a command.
@@ -598,6 +602,7 @@ Toggles between inserting a file and executing a command.
 .B flipnewbuffer
 Toggles between inserting into the current buffer and into a new
 empty buffer.
+(The form 'newbuffer' is deprecated.)
 .TP
 .B dosformat
 When writing a file, switches to writing a DOS format (CR/LF).
@@ -701,6 +706,7 @@ The 'search to replace' menu.
 .TP
 .B replacewith
 The 'replace with' menu, which comes up after 'search to replace'.
+(The form 'replace2' is deprecated.)
 .TP
 .B gotoline
 The 'goto line (and column)' menu.

doc/texinfo/nano.texi

@@ -1008,6 +1008,7 @@ a string in the current list in the file browser
 
 @item searchagain
 Repeats the last search command without prompting.
+(The form 'research' is deprecated.)
 
 @item findprevious
 As @code{searchagain}, but always in the backward direction.
@@ -1042,6 +1043,7 @@ Cuts all text from the cursor position till the end of the buffer.
 
 @item curpos
 Shows the current cursor position: the line, column, and character positions.
+(The form 'cursorpos' is deprecated.)
 
 @item wordcount
 Counts the number of words, lines and characters in the current buffer.
@@ -1171,6 +1173,7 @@ Toggles case sensitivity in searching (search/replace menus only).
 
 @item regexp
 Toggles whether searching/replacing is based on literal strings or regular expressions.
+(The form 'regex' is deprecated.)
 
 @item backwards
 Toggles whether searching/replacing goes forward or backward.
@@ -1183,6 +1186,7 @@ Shows the next history entry in the prompt menus (e.g.@: search).
 
 @item flipreplace
 Toggles between searching for something and replacing something.
+(The form 'dontreplace' is deprecated.)
 
 @item flipexecute
 Toggles between inserting a file and executing a command.
@@ -1190,6 +1194,7 @@ Toggles between inserting a file and executing a command.
 @item flipnewbuffer
 Toggles between inserting into the current buffer and into a new
 empty buffer.
+(The form 'newbuffer' is deprecated.)
 
 @item dosformat
 When writing a file, switches to writing a DOS format (CR/LF).
@@ -1294,6 +1299,7 @@ The 'search to replace' menu.
 
 @item replacewith
 The 'replace with' menu, which comes up after 'search to replace'.
+(The form 'replace2' is deprecated.)
 
 @item gotoline
 The 'goto line (and column)' menu.

src/global.c

@@ -1397,7 +1397,7 @@ sc *strtosc(const char *input)
 	s->scfunc = do_search;
 #ifndef NANO_TINY
     else if (!strcasecmp(input, "searchagain") ||
-	     !strcasecmp(input, "research"))
+	     !strcasecmp(input, "research"))  /* Deprecated.  Remove in 2018. */
 	s->scfunc = do_research;
     else if (!strcasecmp(input, "findprevious"))
 	s->scfunc = do_findprevious;
@@ -1428,7 +1428,7 @@ sc *strtosc(const char *input)
 	s->scfunc = do_linter;
 #endif
     else if (!strcasecmp(input, "curpos") ||
-	     !strcasecmp(input, "cursorpos"))
+	     !strcasecmp(input, "cursorpos"))  /* Deprecated.  Remove in 2018. */
 	s->scfunc = do_cursorpos_void;
     else if (!strcasecmp(input, "gotoline"))
 	s->scfunc = do_gotolinecolumn_void;
@@ -1527,14 +1527,14 @@ sc *strtosc(const char *input)
 	s->scfunc = case_sens_void;
 #endif
     else if (!strcasecmp(input, "regexp") ||
-	     !strcasecmp(input, "regex"))
+	     !strcasecmp(input, "regex"))  /* Deprecated.  Remove in 2018. */
 	s->scfunc = regexp_void;
 #ifndef NANO_TINY
     else if (!strcasecmp(input, "backwards"))
 	s->scfunc = backwards_void;
 #endif
     else if (!strcasecmp(input, "flipreplace") ||
-	     !strcasecmp(input, "dontreplace"))
+	     !strcasecmp(input, "dontreplace"))  /* Deprecated.  Remove in 2018. */
 	s->scfunc = flip_replace_void;
     else if (!strcasecmp(input, "gototext"))
 	s->scfunc = gototext_void;
@@ -1560,7 +1560,7 @@ sc *strtosc(const char *input)
 #endif
 #ifndef DISABLE_MULTIBUFFER
     else if (!strcasecmp(input, "flipnewbuffer") ||
-	     !strcasecmp(input, "newbuffer"))
+	     !strcasecmp(input, "newbuffer"))  /* Deprecated.  Remove in 2018. */
 	s->scfunc = new_buffer_void;
 #endif
 #ifndef DISABLE_BROWSER
@@ -1640,7 +1640,7 @@ int strtomenu(const char *input)
 	return MWHEREIS;
     else if (!strcasecmp(input, "replace"))
 	return MREPLACE;
-    else if (!strcasecmp(input, "replace2") ||
+    else if (!strcasecmp(input, "replace2") ||  /* Deprecated.  Remove in 2018. */
 	     !strcasecmp(input, "replacewith"))
 	return MREPLACEWITH;
     else if (!strcasecmp(input, "gotoline"))