Log Message:
Updated global to 6.5.6.

Version 6.5.6 - December 19 2016

[CHANGES]
New facilities:
o htags-server: New --retry[=n] option.
  If the port is already in use, retry n times with incrementing the port number.
  The default of n is 20.
o htags: Changed the format of function header (--show-position) to make copying
  text easier.
o geco.rc: Added 'fzf' as a selector candidate.
o gtags: New configuration variable 'gtags_hook'.
  gtags_hook=<command line>
	Specify a command line which should be executed at the beginning of gtags(1).
	Leading "./" in any path is always means the project root directory, since
	gtags(1) is always invoked there.
  GTAGS_COMMANDLINE environment variable (read only)
	You can get the effective command line of gtags(1) from the hook. It includes
	both $GTAGS_OPTIONS and real arguments.

   [Usage]
   You can update 'gtags.files' before gtags(1) read it.

	[gtags.conf]
	+----------------------------------------
	|...
	|:gtags_hook=find src lib -print >gtags.files:

   You can refer the effective arguments of gtags(1) from the hook using
   environment variable GTAGS_COMMANDLINE.

	[gtags.conf]
	+----------------------------------------
	|...
	|:gtags_hook=./gen.sh:\
	|:GTAGS_OPTIONS=-c:\

	[gen.sh]
	+----------------------------------------
	|#!/bin/sh
	|echo ">>> $GTAGS_COMMANDLINE"		# show effective command line

	$ gtags -O
	>>> gtags -c -O
	$ _

[INCOMPATIBLE CHANGES]
o htags: Now --cvsweb option always insert 'view=log' to the generated URLs.
  Because it seems to be almost always a desirable specification.

[FIXED BUGS]
o gtags: Gtags often aborts with a message "buffer overflow. \ 
strlimcpy" when
  it encounters a long token (> 152 bytes). Now gtags always ignores it with
  a message "symbol name is too long. (Ignored)".
o htags: Old packages included two CGI scripts (completion.cgi, global.cgi)
  generated in the release manager's machine by mistake. They have some literal
  path like '/opt/local/bin/perl' which works only with MacPorts.
  Now, they are generated in the target (your) machine.