Implement option to start searches at the current position

Doc/cmus.txt

@@ -1209,6 +1209,10 @@ rewind_offset (5) [-1-9999]
 scroll_offset (2) [0-9999]
 	Minimal number of screen lines to keep above and below the cursor.
 
+search_start_beginning (true)
+	Starts searches at the beginning of the current view rather than the
+	current item.
+
 show_all_tracks (true)
 	Display all tracks of the artist when the artist is selected in the tree
 	view. This option is tightly coupled to the auto_expand_albums_\*

options.c

@@ -96,6 +96,7 @@ int tree_width_max = 0;
 int pause_on_output_change = 0;
 int block_key_paste = 1;
 int progress_bar = 1;
+int search_start_beginning = 1;
 
 int colors[NR_COLORS] = {
 	-1,
@@ -1393,6 +1394,21 @@ static void toggle_progress_bar(void *data)
 	update_statusline();
 }
 
+static void get_search_start_beginning(void *data, char *buf, size_t size)
+{
+	strscpy(buf, bool_names[search_start_beginning], size);
+}
+
+static void set_search_start_beginning(void *data, const char *buf)
+{
+	parse_bool(buf, &search_start_beginning);
+}
+
+static void toggle_search_start_beginning(void *data)
+{
+	search_start_beginning ^= 1;
+}
+
 /* }}} */
 
 /* special callbacks (id set) {{{ */
@@ -1665,6 +1681,7 @@ static const struct {
 	DN(pl_env_vars)
 	DT(block_key_paste)
 	DT(progress_bar)
+	DT(search_start_beginning)
 	{ NULL, NULL, NULL, NULL, 0 }
 };
 

options.h

@@ -179,6 +179,7 @@ extern int tree_width_max;
 extern int pause_on_output_change;
 extern int block_key_paste;
 extern int progress_bar;
+extern int search_start_beginning;
 
 extern const char * const aaa_mode_names[];
 extern const char * const view_names[NR_VIEWS + 1];

search_mode.c

@@ -25,6 +25,7 @@
 #include "xstrjoin.h"
 #include "misc.h"
 #include "lib.h"
+#include "options.h"
 #include "command_mode.h"
 #include "keys.h"
 
@@ -199,7 +200,7 @@ void search_mode_ch(uchar ch)
 			return;
 		} else {
 			/* start from beginning if this is first char */
-			int beginning = search_line_empty();
+			int beginning = search_start_beginning && search_line_empty();
 
 			/* save old value
 			 *