Support tilde-prefixed path

  Only ~/path/to style
  see https://svn.boost.org/trac/boost/ticket/5163
Fix exception-handling feature with gcc.jam

  see: https://svn.boost.org/trac/boost/ticket/5293
Fix linker flags with clang

  see: https://svn.boost.org/trac/boost/ticket/5820
Fix infinite loops in regex.replace

  see: https://svn.boost.org/trac/boost/ticket/7176
Check BJAM_NO_MEM_CACHE switch
Make clang-linux actions better
Fix incorrect type
Merge 'boostorg/develop'
Merge 'boostorg/develop' into develop
Merge branch 'boostorg/develop' into develop
Add documentation of the sequence module.
Add toolset_requirements.py to the test suite.
Fix error message.
Add another file to .gitignore.
Fix bug in pathnt.c that caused the results of GLOB to be downcased under some circumstances.
prebuilt.py needs to treat clang-darwin the same way as darwin.
Attempt to fix source_order.py on Windows.
support newer intel >=12 versions. add autodetection of installed versions.
correct version with autodetection of installed versions.
cxxflags should not apply to C files.  Fixes #9815.