correct rl_startup_hook type while USE_SYSTEM_READLINE=1
fix #6031, `@m(x)[3]` syntax
Merge branch 'master' of github.com:JuliaLang/julia
mitigate #6016

at least avoid ever printing the nonsensical "alue" string
Merge pull request #6001 from nalimilan/openlibm

Update openlibm to master and install it properly
Merge pull request #6046 from KDr2/kd/sys_rl

correct rl_startup_hook type while USE_SYSTEM_READLINE=1
fix #6033 and #6044

- trap errors inside timer callbacks
- protect timers from GC
- ignore uv alloc requests when handle->data==NULL
New norm(Matrix) behavior to NEWS
Merge pull request #6037 from JuliaLang/cb/index

some indexing tweaks
fix #6050
Merge pull request #6045 from tkelman/patch-3

Fix install and win-extras for Cygwin cross
fix missing OPENLIBM_FLAGS for make install

this was breaking cross compiles
Merge pull request #6059 from tkelman/patch-2

fix missing OPENLIBM_FLAGS for make install
mention that perf.h is generated in perf.c

https://github.com/JuliaLang/julia/issues/6054

This has come up a couple of times now.
Changed selection of shift-and-invert mode in eigs. Added test for inverse iteration. Docs updated.
Change default of sigma to nothing.
Only non-empty sigma selects shift and invert mode (implies which=LM). Test updated.
Update NEWS.md
Document eye(A) when A is a dense/sparse matrix
New semantics of sigma in eigs(A, sigma)

- `sigma==nothing` specifies forward iteration (ARPACK `iparam(7)=1`), and a numeric real or complex sigma specifies inverse iteration with level shift (`iparam(7)=3` or 4 depending on `complexOP`)