Problem:    Extension for configure should be ".ac".
Solution:   Rename configure.in to configure.ac. (James McCoy, closes vim#1173)

* origin/master: (30 commits)
  patch 8.0.0094 Problem:    When vimrun.exe is not found the error message is not properly             encoded. Solution:   Use utf-16 and MessageBoxW(). (Ken Takata)
  patch 8.0.0093 Problem:    Not using multiprocess build feature. Solution:   Enable multiprocess build with MSVC 10. (Ken Takata)
  patch 8.0.0092 Problem:    C indenting does not support nested namespaces that C++ 17 has. Solution:   Add check that passes double colon inside a name. (Pauli, closes             vim#1214)
  patch 8.0.0091 Problem:    Test_help_complete sometimes fails in MS-Windows console. Solution:   Use getcompletion() instead of feedkeys() and command line             completion. (Hirohito Higashi)
  patch 8.0.0090 Problem:    Test_help_complete sometimes fails in MS-Windows console. Solution:   Use getcompletion() instead of feedkeys() and command line             completion. (Hirohito Higashi)
  patch 8.0.0089 Problem:    Various problems with GTK 3.22.2. Solution:   Fix the problems, add #ifdefs. (Kazunobu Kuriyama)
  patch 8.0.0088 Problem:    When a test fails in Setup or Teardown the problem is not reported. Solution:   Add a try/catch. (Hirohito Higashi)
  patch 8.0.0087 Problem:    When the channel callback gets job info the job may already have             been deleted. (lifepillar) Solution:   Do not delete the job when the channel is still useful. (ichizok,             closes vim#1242, closes vim#1245)
  Updated runtime files.
  patch 8.0.0086 Problem:    Cannot add a comment after ":hide". (Norio Takagi) Solution:   Make it work, add a test. (Hirohito Higashi)
  patch 8.0.0085 Problem:    Using freed memory with recursive function call. (Dominique Pelle) Solution:   Make a copy of the function name.
  patch 8.0.0084 Problem:    Using freed memory when adding to a quickfix list. (Domenique             Pelle) Solution:   Clear the directory name.
  patch 8.0.0083 Problem:    Using freed memory with win_getid(). (Domenique Pelle) Solution:   For the current tab use curwin.
  patch 8.0.0082 Problem:    Extension for configure should be ".ac". Solution:   Rename configure.in to configure.ac. (James McCoy, closes vim#1173)
  patch 8.0.0081 Problem:    Inconsistent function names. Solution:   Rename do_cscope to ex_cscope.  Clean up comments.
  patch 8.0.0080 Problem:    The OS X build fails on Travis. Solution:   Skip the virtual framebuffer on OS X.
  patch 8.0.0079 Problem:    Accessing freed memory in quickfix. (Domenique Pelle) Solution:   Do not free the current list when adding to it.
  patch 8.0.0078 Problem:    Accessing freed memory in quickfix. Solution:   Reset pointer when freeing 'errorformat'. (Domenique Pelle)
  patch 8.0.0077 Problem:    The GUI code is not tested by Travis. Solution:   Install the virtual framebuffer.
  patch 8.0.0076 Problem:    Channel log has double parens ()(). Solution:   Remove () for write_buf_line. (Yasuhiro Matsumoto)
  ...