* varnish: Drop the downstream build system patch
I made sure future changes upstream would less likely break OSS-Fuzz
builds by adding an explicit --enable-oss-fuzz configure option.
* varnish: Reduce build parallelism
The partial build performed seems to be subject to races with 32 CPUs.
* varnish: This is a C project, not C++
Not sure how much this matters, it may change environment variables set
during the build with for example CFLAGS instead of CXXFLAGS. Or it
might just be for statistics reasons? Anyway, this is a C project.
* varnish: Migration to pcre2
See https://github.com/varnishcache/varnish-cache/pull/3635
* varnish: Static linking to pcre2
* varnish: Only build the fuzzer
Static linking of pcre2 fails the libvarnishapi build, not needed by
the ESI fuzzer. That's also less time wasted building irrelevant
components. We can figure out why libvarnishapi fails to build in
this environment later.
* varnish: Missing build step
DavidKorczynski