dcf3eeb Auto-sync with upstream master

Authored and Committed by fweimer 6 years ago
    Auto-sync with upstream master
    
    Upstream commit: e237357a5a0559dee92261f1914d1fa2cd43a1a8
    
    - Support an arbitrary number of search domains in the stub resolver (#168253)
    - Detect and apply /etc/resolv.conf changes in libresolv (#1374239)
    - Increase malloc alignment on i386 to 16 (swbz#21120)
    - Make RES_ROTATE start with a random name server (swbz#19570)
    - Fix tgmath.h totalorder, totalordermag return type (swbz#21687)
    - Miscellaneous sys/ucontext.h namespace fixes (swbz#21457)
    - Rename struct ucontext tag (swbz#21457)
    - Call exit system call directly in clone (swbz#21512)
    - powerpc64le: Enable float128
    - getaddrinfo: Merge IPv6 addresses and IPv4 addresses (swbz#21295)
    - Avoid .symver on common symbols (swbz#21666)
    - inet_pton: Reject IPv6 addresses with many leading zeros (swbz#16637)
    
        
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