SQL schema: Add function symboldb.basename (TEXT)
SQL schema: Add additional indexes on file, directory, symlink basenames
cxxll::fd_handle test case: make for flexible regarding file descriptors
cxxll::fd_sink test case: make for flexible regarding file descriptors
cxxll::pg_testdb::~pg_testdb(): Fix typo in log message
cxxll::pgconn_handle: Constructor and reset() take ownership on failure

This was documented, but not actually implemented.
cxxll::subprocess test: Recent rev versions preserve missing LF before EOF
TODO: Keep DT_NEEDED order