While trying to build a local lsquic docker image for interop testing, I
noticed a few problems.

1) I had added a space in the cmake directive for LIBSSL_LIB_ssl which
   doesn't need to be there, but both the LIBSSL_LIB_ssl and
   LIBSSL_LIB_crypto macros don't need to be specified anymore as the
   cmake infrastructure detects those properly, so lets just remove
   them.

2) The http_client.c file fails to build in the docker image:

8.492 In file included from /src/lsquic/bin/http_client.c:52:
8.492 /src/lsquic/bin/../src/liblsquic/lsquic_stream.h:87:25: error: field 'shf_frame_type' has incomplete type
8.492    87 |     enum hq_frame_type  shf_frame_type;
8.492       |                         ^~~~~~~~~~~~~~
8.492 /src/lsquic/bin/../src/liblsquic/lsquic_stream.h:101:33: error: field 'hqfi_vint2_state' has incomplete type
8.492   101 |     struct varint_read2_state   hqfi_vint2_state;
8.492       |                                 ^~~~~~~~~~~~~~~~
8.492 /src/lsquic/bin/../src/liblsquic/lsquic_stream.h:108:33: error: field 'hqfi_vint1_state' has incomplete type
8.492   108 |     struct varint_read_state    hqfi_vint1_state;
8.492       |                                 ^~~~~~~~~~~~~~~~
8.492 /src/lsquic/bin/../src/liblsquic/lsquic_stream.h:284:5: error: unknown type name 'lsquic_sfcw_t'
8.492   284 |     lsquic_sfcw_t                   fc;
8.492       |     ^~~~~~~~~~~~~

It appears some header includes are missing from the build.  It appears
the last rebuild of the container was about 2 months ago, so I imagine
some intervening reorganization broke this and didn't get noticed.  Fix
that up so the container builds properly.