flipsign implementation for Float32 and Float64.
Update zlib URL for win-extras
Relax linalg tests.
lex dot-relational operators the same as other dot operators. fixes #5689
Merge pull request #5691 from JuliaLang/anj/relax

Relax linalg tests.
getaddrinfo is now exported; remove Base prefix in manual
fix rsearch of char to return 0 for not found. fixes #5679

fix getindex of SubString with out of bounds indexes
Merge branch 'master' of github.com:JuliaLang/julia