Low: "char *" more string funcs friendly than unsigned variant

Also make use of typedef'd boothc_site.

src/booth.h

@@ -77,10 +77,10 @@
 #define TICKET_LOST CHAR2CONST('L', 'O', 'S', 'T')
 
 
-typedef unsigned char boothc_site  [BOOTH_NAME_LEN];
-typedef unsigned char boothc_ticket[BOOTH_NAME_LEN];
-typedef unsigned char boothc_attr[BOOTH_NAME_LEN];
-typedef unsigned char boothc_attr_value[BOOTH_ATTRVAL_LEN];
+typedef char boothc_site[BOOTH_NAME_LEN];
+typedef char boothc_ticket[BOOTH_NAME_LEN];
+typedef char boothc_attr[BOOTH_NAME_LEN];
+typedef char boothc_attr_value[BOOTH_ATTRVAL_LEN];
 
 /* message option bits */
 enum {
@@ -290,7 +290,7 @@ struct booth_site {
 	/** Roles, like ACCEPTOR, PROPOSER, or LEARNER. Not really used ATM. */
 	int role;
 
-	char addr_string[BOOTH_NAME_LEN];
+	boothc_site addr_string;
 
 	int tcp_fd;
 	int udp_fd;

src/config.c

@@ -909,7 +909,7 @@ static int get_other_site(struct booth_site **node)
 }
 
 
-int find_site_by_name(unsigned char *site, struct booth_site **node, int any_type)
+int find_site_by_name(char *site, struct booth_site **node, int any_type)
 {
 	struct booth_site *n;
 	int i;

src/config.h

@@ -260,7 +260,7 @@ struct booth_config {
     /** File containing the authentication file. */
 	char authfile[BOOTH_PATH_LEN];
 	struct stat authstat;
-	unsigned char authkey[BOOTH_MAX_KEY_LEN];
+	char authkey[BOOTH_MAX_KEY_LEN];
 	int authkey_len;
     /** Maximum time skew between peers allowed */
 	int maxtimeskew;
@@ -297,7 +297,7 @@ int read_config(const char *path, int type);
 
 int check_config(int type);
 
-int find_site_by_name(unsigned char *site, struct booth_site **node, int any_type);
+int find_site_by_name(char *site, struct booth_site **node, int any_type);
 int find_site_by_id(uint32_t site_id, struct booth_site **node);
 
 const char *type_to_string(int type);

src/main.c

@@ -274,7 +274,7 @@ void list_peers(int fd)
  */
 static void trim_key()
 {
-	unsigned char *p;
+	char *p;
 	int i;
 
 	for (i=0, p=booth_conf->authkey; i < booth_conf->authkey_len; i++, p++)