use https instead of http for web links (#31817)

LICENSE.md

@@ -29,26 +29,26 @@ for exceptions.
 
 Julia includes code from the following projects, which have their own licenses:
 
-- [crc32c.c](http://stackoverflow.com/questions/17645167/implementing-sse-4-2s-crc32c-in-software) (CRC-32c checksum code by Mark Adler) [[ZLib](https://opensource.org/licenses/Zlib)].
+- [crc32c.c](https://stackoverflow.com/questions/17645167/implementing-sse-4-2s-crc32c-in-software) (CRC-32c checksum code by Mark Adler) [[ZLib](https://opensource.org/licenses/Zlib)].
 - [LDC](https://github.com/ldc-developers/ldc/blob/master/LICENSE) (for ccall/cfunction ABI definitions) [BSD-3]. The portion of code that Julia uses from LDC is [BSD-3] licensed.
-- [LLVM](http://releases.llvm.org/3.9.0/LICENSE.TXT) (for parts of src/jitlayers.cpp and src/disasm.cpp) [BSD-3, effectively]
-- [MUSL](http://git.musl-libc.org/cgit/musl/tree/COPYRIGHT) (for getopt implementation on Windows) [MIT]
+- [LLVM](https://releases.llvm.org/3.9.0/LICENSE.TXT) (for parts of src/jitlayers.cpp and src/disasm.cpp) [BSD-3, effectively]
+- [MUSL](https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT) (for getopt implementation on Windows) [MIT]
 - [MINGW](https://sourceforge.net/p/mingw/mingw-org-wsl/ci/legacy/tree/mingwrt/mingwex/dirname.c) (for dirname implementation on Windows) [MIT]
-- [NetBSD](http://www.netbsd.org/about/redistribution.html) (for setjmp, longjmp, and strptime implementations on Windows) [BSD-3]
+- [NetBSD](https://www.netbsd.org/about/redistribution.html) (for setjmp, longjmp, and strptime implementations on Windows) [BSD-3]
 - [Python](https://docs.python.org/2/license.html) (for strtod implementation on Windows) [BSD-3, effectively]
 
 The following components included in Julia `Base` have their own separate licenses:
 
 - base/grisu/* [BSD-3] (see [double-conversion](https://github.com/google/double-conversion/blob/master/LICENSE))
-- base/special/{exp,rem_pio2,hyperbolic}.jl [Freely distributable with preserved copyright notice] (see [FDLIBM](http://www.netlib.org/fdlibm))
+- base/special/{exp,rem_pio2,hyperbolic}.jl [Freely distributable with preserved copyright notice] (see [FDLIBM](https://www.netlib.org/fdlibm))
 
 The Julia language links to the following external libraries, which have their
 own licenses:
 
 - [FEMTOLISP](https://github.com/JeffBezanson/femtolisp) [BSD-3]
-- [LIBUNWIND](http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob_plain;f=LICENSE;hb=master) [MIT]
+- [LIBUNWIND](https://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob_plain;f=LICENSE;hb=master) [MIT]
 - [LIBUV](https://github.com/joyent/libuv/blob/master/LICENSE) [MIT]
-- [LLVM](http://releases.llvm.org/6.0.0/LICENSE.TXT) [BSD-3, effectively]
+- [LLVM](https://releases.llvm.org/6.0.0/LICENSE.TXT) [BSD-3, effectively]
 - [UTF8PROC](https://github.com/JuliaStrings/utf8proc) [MIT]
 
 The following components included in `stdlib` have their own separate licenses:
@@ -60,26 +60,26 @@ Julia's `stdlib` uses the following external libraries, which have their own lic
 
 - [DSFMT](http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/LICENSE.txt) [BSD-3]
 - [OPENLIBM](https://github.com/JuliaMath/openlibm/blob/master/LICENSE.md) [MIT, BSD-2, ISC]
-- [GMP](http://gmplib.org/manual/Copying.html#Copying) [LGPL3+ or GPL2+]
+- [GMP](https://gmplib.org/manual/Copying.html#Copying) [LGPL3+ or GPL2+]
 - [LIBGIT2](https://github.com/libgit2/libgit2/blob/development/COPYING) [GPL2+ with unlimited linking exception]
 - [CURL](https://curl.haxx.se/docs/copyright.html) [MIT/X derivative]
 - [LIBSSH2](https://github.com/libssh2/libssh2/blob/master/COPYING) [BSD-3]
 - [MBEDTLS](https://tls.mbed.org/how-to-get) [either GPLv2 or Apache 2.0]
-- [MPFR](http://www.mpfr.org/mpfr-current/mpfr.html#Copying) [LGPL3+]
+- [MPFR](https://www.mpfr.org/mpfr-current/mpfr.html#Copying) [LGPL3+]
 - [OPENBLAS](https://raw.github.com/xianyi/OpenBLAS/master/LICENSE) [BSD-3]
-- [LAPACK](http://netlib.org/lapack/LICENSE.txt) [BSD-3]
-- [PCRE](http://www.pcre.org/licence.txt) [BSD-3]
+- [LAPACK](https://netlib.org/lapack/LICENSE.txt) [BSD-3]
+- [PCRE](https://www.pcre.org/licence.txt) [BSD-3]
 - [SUITESPARSE](http://suitesparse.com) [mix of LGPL2+ and GPL2+; see individual module licenses]
 
 Julia's build process uses the following external tools:
 
 - [PATCHELF](https://nixos.org/patchelf.html)
-- [OBJCONV](http://www.agner.org/optimize/#objconv)
+- [OBJCONV](https://www.agner.org/optimize/#objconv)
 
 Julia bundles the following external programs and libraries on some platforms:
 
-- [7-Zip](http://www.7-zip.org/license.txt)
-- [ZLIB](http://zlib.net/zlib_license.html)
+- [7-Zip](https://www.7-zip.org/license.txt)
+- [ZLIB](https://zlib.net/zlib_license.html)
 - [LIBEXPAT](http://expat.cvs.sourceforge.net/viewvc/expat/expat/README)
 
 On some platforms, distributions of Julia contain SSL certificate authority certificates,