Enable default value for head parameter

Pages which expect head to be specified in the querystring can now be
given a default value, configurable per repository (via repo.defbranch,
which defaults to "master").

Currently, only the log page actually works without parameters, but the
defbranch is bound to be exploited.

This also removes some dead code from shared.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
diff --git a/shared.c b/shared.c
index 8505397..a1e1acd 100644
--- a/shared.c
+++ b/shared.c
@@ -32,10 +32,6 @@
 int cgit_max_msg_len = 60;
 int cgit_max_commit_count = 50;
 
-char *cgit_repo_name    = NULL;
-char *cgit_repo_desc    = NULL;
-char *cgit_repo_owner   = NULL;
-
 int cgit_query_has_symref = 0;
 int cgit_query_has_sha1   = 0;
 
@@ -86,6 +82,7 @@
 	ret->path = NULL;
 	ret->desc = NULL;
 	ret->owner = NULL;
+	ret->defbranch = "master";
 	ret->snapshots = cgit_snapshots;
 	ret->module_link = cgit_module_link;
 	return ret;
@@ -133,6 +130,8 @@
 		cgit_repo->desc = xstrdup(value);
 	else if (cgit_repo && !strcmp(name, "repo.owner"))
 		cgit_repo->owner = xstrdup(value);
+	else if (cgit_repo && !strcmp(name, "repo.defbranch"))
+		cgit_repo->defbranch = xstrdup(value);
 	else if (cgit_repo && !strcmp(name, "repo.snapshots"))
 		cgit_repo->snapshots = atoi(value);
 	else if (cgit_repo && !strcmp(name, "repo.module-link"))
@@ -141,16 +140,6 @@
 		cgit_read_config(value, cgit_global_config_cb);
 }
 
-void cgit_repo_config_cb(const char *name, const char *value)
-{
-	if (!strcmp(name, "name"))
-		cgit_repo_name = xstrdup(value);
-	else if (!strcmp(name, "desc"))
-		cgit_repo_desc = xstrdup(value);
-	else if (!strcmp(name, "owner"))
-		cgit_repo_owner = xstrdup(value);
-}
-
 void cgit_querystring_cb(const char *name, const char *value)
 {
 	if (!strcmp(name,"r")) {