-update run command to include LD_LIBRARY_PATH
-suggest installing libnghttp3-dev on Ubuntu
-drop "-f" from clean recipe (it is already included in $(RM))
Part of https://github.com/openssl/project/issues/253
Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22623)