Add extern declaration for program_arsgstring

In test.c, this patch changes the type of program_argstring to char *
from a const char *. This is because, we use a char * string in the rest
of the program and declare an extern accordingly. Removing the const
type helps in keeping the code cleaner at no extra cost.

src/ChangeLog

@@ -1,3 +1,9 @@
+2014-11-22  Darshit Shah  <darnir@gmail.com>
+
+	* wget.h: Make extern declaration for program_argstring.
+	* warc.c: Remove extern declaration
+	* test.c: Make program_argstring a char *, instead of const char *.
+
 2014-11-22  Darshit Shah  <darnir@gmail.com>
 
 	* wget.h: Make extern declaration for program_name

src/test.c

@@ -51,7 +51,7 @@ const char *test_append_uri_pathel(void);
 const char *test_are_urls_equal(void);
 const char *test_is_robots_txt_url(void);
 
-const char *program_argstring = "TEST";
+char *program_argstring = "TEST";
 
 int tests_run;
 

src/warc.c

@@ -68,10 +68,6 @@ as that of the covered work.  */
 #endif
 
 
-/* Set by main in main.c */
-extern char *program_argstring;
-
-
 /* The log file (a temporary file that contains a copy
    of the wget log). */
 static FILE *warc_log_fp;

src/wget.h

@@ -314,6 +314,7 @@ typedef double SUM_SIZE_INT;
 
 extern const char *exec_name;
 extern char *program_name;
+extern char *program_argstring;
 
 /* Document type ("dt") flags */
 enum