medley and loadup script problems on Solaris

[nbriggs]

There are a number of things that break when trying to use the medley script and the loadup script on Solaris.

1. head does not accept a --bytes argument: elif [ "$(uname -s | head --bytes 6)" = "CYGWIN" ] should probably use ... | cut -c1-6)"... instead, assuming CYGWIN has cut

2. medley /path/to/sysout doesn't work as advertised:

medley /opt/medley/loadups/full.sysout 
head: illegal option -- bytes

In command line arguments:
ERROR: unexpected argument "/opt/medley/loadups/full.sysout"

Usage: medley [flags] [sysout] [--] [pass_args ...]

3. medley --full (or any other --name-of-sysout) doesn't work because script locating doesn't work (see 4)

medley --full
head: illegal option -- bytes
Error: The sysout argument --full was specified in command line arguments,
but the directory "//loadups" where full.sysout is supposed to be located
cannot be found.
Exiting.

4. loadup -f doesn't work because it can't find where the script directory is.

% loadup -f
/opt/medley/loadup[223]: .: /opt/medley/loadup-setup.sh: cannot open [No such file or directory]

Solaris seems to make a point of ensuring that when a script locates where it was called from it gets the source directory of the symbolic link not the directory where the symbolic link points.

[nbriggs]

The default Solaris versions of basename and dirname don't seem to accept the -- to terminate flags, however the /usr/gnu/bin/ versions do. I see both styles of usage in the script locating code.