Added some missed .h files.

src/modify.h

@@ -0,0 +1,36 @@
+/**
+* @file modify.h
+* Header file for the modify module.
+* 
+* Part of the core tbaMUD source code distribution, which is a derivative
+* of, and continuation of, CircleMUD.
+*                                                                        
+* All rights reserved.  See license for complete information.                                                                
+* Copyright (C) 1993, 94 by the Trustees of the Johns Hopkins University 
+* CircleMUD is based on DikuMUD, Copyright (C) 1990, 1991.
+* 
+* @todo This module is originally defined as 'Run-time modification of game 
+* variables.' I believe it has digressed from the original intent. This
+* header file is created to help redefine (over time) what the heck modify.h
+* is. For example, publicly functions declared in comm.h but defined in modify.c
+* should have their declarations moved here.  
+*
+*/
+#ifndef _MODIFY_H_
+#define _MODIFY_H_
+
+/* Public functions */
+void show_string(struct descriptor_data *d, char *input);
+void smash_tilde(char *str);
+void paginate_string(char *str, struct descriptor_data *d);
+/** @todo should this really be in modify.c? */
+ACMD(do_skillset);
+/* Following function prototypes moved here from comm.h */
+void  string_write(struct descriptor_data *d, char **txt, size_t len, long mailto, void *data);
+void  string_add(struct descriptor_data *d, char *str);
+void  page_string(struct descriptor_data *d, char *str, int keep_internal);
+/* page string function & defines */
+#define PAGE_LENGTH 22
+#define PAGE_WIDTH  80
+
+#endif /* _MODIFY_H_*/