move defines from vim.h

buffer.h:
   buflist_getfile() flags
   buflist_new() flags
   buf_freeall() flags
   do_buffer() flags

charset.h:
   chartab[] flags

edit.h:
   in_cinkeys() flags
   change_indent() flags
   beginline() flags
   insertchar() flags
   nv_mousescroll() flags

eval.c
   AUTOLOAD_CHAR

eval.h:
   enum for vimvars[]

ex_cmds.h:
   do_ecmd
   read_viminfo flags

ex_cmds2.h:
   check_changed() flags
   do_source() flags

ex_cmds_defs.h:
   BAD_* flags

ex_docmd.h:
   VALID_PATH VALID_HEAD
   EXMODE_*
   do_cmdline() flags
added include

ex_getln.c
   *_ESC_CHARS definitions

ex_getln.h:
   history table flags - used by add_to_history()

fileio.h:
   readfile() flags
   event_T definition

getchar.h:
   ins_typebuf() flags
   KEYLEN_*

globals.h:
   NO_SCREEN
   NO_BUFFERS
   SEA_* defines
   current_SID flags
   hlf_T enum
   HL_FLAGS
   do_profiling() flags
   schar_T
   sattr_T

indent.h:
   set_indent() flags

macros.h:
   BINARY_FILE_IO flags

mbyte.h:
   MB_BYTE2LEN*
   ENC_*

memfile.h:
   mf_sync() flags

misc1.h:
   open_line() flags

message.h:
   do_dialog() flags
   vim_dialogyesno() flags
   DLG_BUTTON_*

normal.h:
   find_ident_under_cursor() flags

ops.h:
   do_put() flags
   operator ID's

option.h:
   buf_copy_options() flags
   OPT_* flags

os_unix.h:
   mch_nodetype() flags

quickfix.h:
   skip_vimgrep_pat() flags

regexp.h:
   vim_regcomp() flags
   values for reg_do_extmatch

search.h:
   do_search() flags
   search_regcomp() flags
   findmatchlimit() flags

syntax.h:
   HL_* flags
      HL_FOLD is used in buffer_defs.h but nvim
      compiles just fine with the defines in
      syntax.h

tag.h:
   do_tag() flags
   find_tags() flags

term.h:
   TBUFSZ flags
   MOUSE flags

ui.h:
   jump_to_mouse() flags

window.h:
   file_name_in_line() flags
   win_split() flags
   MIN_LINES
   MIN_COLUMNS