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, 2 insertions, 3 deletions

diff --git a/config/server_lds.conf b/config/server_lds.conf
index a30106c..7382dbe 100644
--- a/config/server_lds.conf
+++ b/config/server_lds.conf
@@ -9,7 +9,7 @@
 #   authMode          "anonymous" or "user"
 #   username          Username (required when authMode = user)
 #   password          Password (required when authMode = user)
-#   trustList         Trusted certificate path (repeat for multiple)
+#   trustStore        Directory containing trusted certificates (.der)
 
 port = 4840
 applicationUri = urn:bobink.ServerLDS
@@ -21,5 +21,4 @@ authMode = user
 username = user
 password = password
 
-trustList = certs/ServerRegisterClient_cert.der
-trustList = certs/ClientFindServers_cert.der
+trustStore = certs/trust/server_lds