Fix typo in qrfact doc.
Fix Windows symlink issues

On Windows, symlinks require admin priveleges.  For directories,
it is possible to create junction points instead.  This PR

* Provide a message on Windows if symlink creation fails, indicating
  that symlinks require admin priveleges
* Automatically attempts to create junction points whenever symlinking
  a directory
Merge pull request #7268 from JuliaLang/sf/dontbashme

/bin/sh shebang instead of /bin/bash in deps/jlchecksum
Update splash screen in getting-started.rst to current
Merge pull request #7276 from ivarne/patch-4

Update splash screen in getting-started.rst to current
Merge branch 'master' of https://github.com/JuliaLang/julia
Merge pull request #7274 from JuliaLang/kms/win_symlink_fix

RFC: Fix Windows symlink issues
Merge pull request #7265 from amckinlay/patch-1

Tweak description of assignment scoping
fix #7277
Merge branch 'master' of github.com:JuliaLang/julia
fix #7272, error for declaring a var both local and global

in a couple places we were depending on `local` overriding `global`;
these are now cleaned up as well.
warn_once -> Base.warn_once
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #7257 from catawbasam/master

isvalid() chr2ind() ind2chr() for SubString of DirectIndexString
parse both arms of ? with the same precedence. fixes #7252
Merge branch 'master' of github.com:JuliaLang/julia
Fix #7284 (segfault in jl_demangle)
Remove unused symbolicgoto_sym and symboliclabel_sym globals
Merge pull request #7286 from JuliaLang/teh/profilesegv

Fix #7284 (segfault in jl_demangle)
Extend pipelining to all Callables