Replace ClientFindServers with unified Client, use trust store directories

Replace the single-purpose ClientFindServers program with a unified Client
that supports three operations via CLI: find-servers, get-endpoints, and
read-time.  This simplifies the architecture by using one client binary with
a single config file instead of a monolithic program that did everything in
one run.

Split the ServerRegister config into separate server and client config files
so the LDS-registration credentials are isolated from the server's own
settings.  The discovery URL moves from config to a CLI argument.

Replace repeated trustList config entries with a single trustStore directory
path.  Each program now points to a directory under certs/trust/ containing
.der files, so adding or removing trust is a file-copy operation rather than
editing every config file.  Add loadTrustStore()/freeTrustStore() to
common.c and remove the now-unused configGetAll() from the config parser.

Simplify the test matrix from 6 to 4 cases (security and auth are
orthogonal, so the full 3x2 matrix is unnecessary).  Update run_test.sh to
invoke the new Client three times and use port-polling instead of sleep.

1 files changed, 1 insertions, 20 deletions

diff --git a/src/config.h b/src/config.h
index 649278d..2c5e364 100644
--- a/src/config.h
+++ b/src/config.h
@@ -7,8 +7,6 @@
  *
  * Parses configuration files with one key=value pair per line.
  * Lines starting with '#' are comments.  Blank lines are ignored.
- * Repeated keys are allowed (used for list-valued settings like
- * trustList).
  */
 
 #include <stddef.h>
@@ -28,8 +26,7 @@ typedef struct
 /**
  * @brief A parsed configuration file.
  *
- * Holds a dynamic array of ConfigEntry items.  Duplicate keys are
- * allowed (used for list-valued settings like trustList).
+ * Holds a dynamic array of ConfigEntry items.
  */
 typedef struct
 {
@@ -92,22 +89,6 @@ const char *configRequire (const Config *cfg, const char *key,
 int configRequireInt (const Config *cfg, const char *key, const char *program);
 
 /**
- * @brief Collects all values for a repeated key.
- *
- * Allocates an array of char* pointers to the values stored
- * in @p cfg.  The caller must free the array itself (but not
- * the strings, which are owned by cfg).
- *
- * @param cfg   The parsed configuration.
- * @param key   The key to collect (e.g. "trustList").
- * @param out   Output: heap-allocated array of string pointers.
- *              Set to NULL if the key is not present.
- * @param size  Output: number of entries in @p out.
- */
-void configGetAll (const Config *cfg, const char *key, char ***out,
-                   size_t *size);
-
-/**
  * @brief Frees all memory owned by a Config structure.
  *
  * After this call the Config is zeroed and must not be used