runtests: allow <strippart> to remove lines

For verify file, if the strippart condition removes the line completely
it is now removed from the array.
test96: updated according to recent changes
formdata: Must use Curl_safefree instead of free
tool_operate: Let curl handle cleanup take place in config_free()
tool_operate: Added support for performing URL specific operations
secureserver: FIPS option is only supported since stunnel 5.00
RELEASE-NOTES: Synced with 8e62f7a6503a
tests: Re-enabled IMAP tests that require URL specific option support
TODO: Removed url-specific options
tool_operate: Move the trace and error file closure to tool_cfgable
tool_metalink: fix compiler warning when built without metalink
tests: Updated the titles of tests 815 and 816
tests: Removed test 807 as it has been superseded by tests 815 and 816
tests: Added test for IMAP LSUB command
nss: use correct preprocessor macro

SSL_ENABLE_ALPN can be used for preprocessor ALPN feature detection,
but not SSL_NEXT_PROTO_SELECTED, since it is an enum value and not a
preprocessor macro.
NPN/ALPN: allow disabling via command line

when using --http2 one can now selectively disable NPN or ALPN with
--no-alpn and --no-npn. for now honored with NSS only.

TODO: honor this option with GnuTLS and OpenSSL
secureserver: Only set stunnel FIPS option when available

It seems the fips config option causes an error if FIPS mode was
not enabled at stunnel compile-time.  FIPS support was disabled
by default in stunnel 5.00, so this is probably really only needed
on versions between 4.32 and 5.00.
tool_cfgable: Moved easy handle cleanup to fix pingpong logout issues

Commmit c5f8e2f5f4 removed the easy handle clean-up from tool_operate,
letting the code that was already present in free_config_fields()
perform the task. Unfortunately, this wasn't the correct place to do
this as it broke protocols, that would perform a logout, as the main
clean-up in tool_main had already been called.
curl_easy_setopt.3: add CURLOPT_SSL_ENABLE_ALPN/NPN
version: next release will become 7.36.0