Don't assume /bin/bash is installed on all OSes

Use `/usr/bin/env bash` where appropriate.

contrib/zsh-completion/install.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 ZSH_FUNC_DIR="/usr/share/zsh/site-functions"

scripts/build.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # This script builds the application from source for multiple platforms.
 set -e

scripts/dist.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # Get the version from the command line

scripts/verify_no_uuid.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 grep GenerateUUID consul/state/state_store.go
 RESULT=$?

website/packer.json

@@ -34,7 +34,7 @@
         "bundle check || bundle install --jobs 7",
         "bundle exec middleman build",
 
-        "/bin/bash ./scripts/deploy.sh"
+        "/usr/bin/env bash ./scripts/deploy.sh"
       ]
     }
   ]

website/scripts/deploy.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 PROJECT="consul"