Add parameter to adjust max message length in log listings

The parameter "max-message-length" can be specified in cgitrc, default value
is 60.

This affects the log message shown in repo summary and shortlog.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

shared.c

@@ -25,6 +25,8 @@ int cgit_cache_dynamic_ttl     =  5;
 int cgit_cache_static_ttl      = -1;
 int cgit_cache_max_create_time =  5;
 
+int cgit_max_msg_len = 60;
+
 char *cgit_repo_name    = NULL;
 char *cgit_repo_desc    = NULL;
 char *cgit_repo_owner   = NULL;
@@ -70,6 +72,8 @@ void cgit_global_config_cb(const char *name, const char *value)
 		cgit_cache_static_ttl = atoi(value);
 	else if (!strcmp(name, "cache-dynamic-ttl"))
 		cgit_cache_dynamic_ttl = atoi(value);
+	else if (!strcmp(name, "max-message-length"))
+		cgit_max_msg_len = atoi(value);
 }
 
 void cgit_repo_config_cb(const char *name, const char *value)