tell cmake that there is no library for dlopen on emscripten (shuts up warnings "emcc: cannot find library "dl"" for projects that add CMAKE_DL_LIBS to the link line)
Fix returning uninitialised memory to C code. flowinfo is a dead field that's unused, scope_id is actually useful but browsers have terrible support for link-local IPv6 addresses so we needn't support it now.
Merge pull request #2759 from NWilson/incoming

fix linker warning and a small bit of uninitialised memory
refactor parseHeapTemp to be useful in more places
experimental POINTER_MASKING option
Merge pull request #2758 from hamishwillee/incoming

Incoming - docs updates to theme and to tidy up wiki articles.
text update
Partial updates to file
File system section updates (all now either draft or complete)
Updated Building projects and general fixes and links to other documents