Add in secp256k repo so that customer can build.

.gitignore

@@ -10,7 +10,6 @@ tiny-AES-c/
 
 
 
-secp256k1/
 Trash/debug_tests/
 node_modules/
 
@@ -20,4 +19,3 @@ node_modules/
 *.dylib
 *.dll
 build/
-

build.sh

@@ -129,12 +129,13 @@ if [ "$HELP" = true ]; then
     echo ""
     echo "Available NIPs:"
     echo "  001 - Basic Protocol (event creation, signing)"
+    echo "  004 - Encryption (legacy)"
     echo "  005 - DNS-based identifiers"
     echo "  006 - Key derivation from mnemonic"
     echo "  011 - Relay information document"
     echo "  013 - Proof of Work"
     echo "  019 - Bech32 encoding (nsec/npub)"
-    echo "  044 - Encryption"
+    echo "  044 - Encryption (modern)"
     echo ""
     echo "Examples:"
     echo "  $0                    # Auto-detect NIPs, build for current arch"