libyaml 0.1.6

Closes a security vulnerability:
http://www.ocert.org/advisories/ocert-2014-003.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2525
libyaml: update 0.1.6 bottle.

Closes #27923.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Fix Keg#find so we don't have to deal with it everywhere

lol inheritance
Put constant strings in a constant
Don't mix boolean operator types
Fix overly defensive handling of src parameter in make_relative_symlink

This method is for internal use only. It is unsuitable for use in
formulae, which should use install_symlink to create relative symlinks.
Thus callers are required to pass a Pathname, not a string, and we can
remove this conditional.

Further, if src is not absolute, then src.relative_path_from(dirname)
will fail. All callers currently pass absolute pathnames. Therefore we
don't need to call expand_path when printing it.
Return early so we can reduce nesting of conditionals
aria2 1.18.4
aria2: add 1.18.4 bottle.
Only write files if we actually made a change
Fix class definition so we can require files first
Move initializer after constants and class methods
ghostscript: fix building with djvu support

Fix from @baikal.

Closes #27427
lwtools 4.9

Closes #27928.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
mysql 5.6.17
mysql: update 5.6.17 bottle.

Closes #27930.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
mono: use the patch submitted upstream instead.

Closes #27925.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
tomcat devel 8.0.5

Closes #27934.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gifsicle 1.81

Update gifsicle and make X11 dependency optional

Closes #27915.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
avro tools 1.7.6

Closes #27676.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>