Update git-flow-avh to 0.6.0

This updates the git-flow-avh plugin to the latest version
from https://github.com/petervanderdoes/git-flow-completion
(0.6.0 at the time of this commit).

This mainly adds support for the "git flow bugfix" command.

plugins/git-flow-avh/git-flow-avh.plugin.zsh

@@ -36,6 +36,7 @@ _git-flow ()
             subcommands=(
                 'init:Initialize a new git repo with support for the branching model.'
                 'feature:Manage your feature branches.'
+                'bugfix:Manage your bugfix branches.'
                 'config:Manage your configuration.'
                 'release:Manage your release branches.'
                 'hotfix:Manage your hotfix branches.'
@@ -44,6 +45,7 @@ _git-flow ()
                 'finish:Finish the branch you are currently on.'
                 'delete:Delete the branch you are currently on.'
                 'publish:Publish the branch you are currently on.'
+                'rebase:Rebase the branch you are currently on.'
             )
             _describe -t commands 'git flow' subcommands
         ;;
@@ -70,6 +72,10 @@ _git-flow ()
                     (feature)
                         __git-flow-feature
                     ;;
+                    (bugfix)
+                        __git-flow-bugfix
+                    ;;
+
                     (config)
                     __git-flow-config
                     ;;
@@ -98,6 +104,7 @@ __git-flow-release ()
                 'list:List all your release branches. (Alias to `git flow release`)'
                 'publish:Publish release branch to remote.'
                 'track:Checkout remote release branch.'
+                'rebase:Rebase from integration branch.'
                 'delete:Delete a release branch.'
             )
             _describe -t commands 'git flow release' subcommands
@@ -141,6 +148,12 @@ __git-flow-release ()
                         ':version:__git_flow_version_list'
                 ;;
 
+                (rebase)
+                    _arguments \
+                        -i'[Do an interactive rebase]' \
+                        ':branch:__git_branch_names'
+                ;;
+
                 *)
                     _arguments \
                         -v'[Verbose (more) output]'
@@ -167,7 +180,9 @@ __git-flow-hotfix ()
                 'start:Start a new hotfix branch.'
                 'finish:Finish a hotfix branch.'
                 'delete:Delete a hotfix branch.'
+                'rebase:Rebase from integration branch.'
                 'list:List all your hotfix branches. (Alias to `git flow hotfix`)'
+                'rename:Rename a hotfix branch.'
             )
             _describe -t commands 'git flow hotfix' subcommands
             _arguments \
@@ -201,6 +216,12 @@ __git-flow-hotfix ()
                         ':hotfix:__git_flow_hotfix_list'
                 ;;
 
+                (rebase)
+                    _arguments \
+                        -i'[Do an interactive rebase]' \
+                        ':branch:__git_branch_names'
+                ;;
+
                 *)
                     _arguments \
                         -v'[Verbose (more) output]'
@@ -234,6 +255,7 @@ __git-flow-feature ()
                 'rebase:Rebase from integration branch.'
                 'checkout:Checkout local feature branch.'
                 'pull:Pull changes from remote.'
+                'rename:Rename a feature branch.'
             )
             _describe -t commands 'git flow feature' subcommands
             _arguments \
@@ -305,6 +327,102 @@ __git-flow-feature ()
     esac
 }
 
+__git-flow-bugfix ()
+{
+    local curcontext="$curcontext" state line
+    typeset -A opt_args
+
+    _arguments -C \
+        ':command:->command' \
+        '*::options:->options'
+
+    case $state in
+        (command)
+
+            local -a subcommands
+            subcommands=(
+                'start:Start a new bugfix branch.'
+                'finish:Finish a bugfix branch.'
+                'delete:Delete a bugfix branch.'
+                'list:List all your bugfix branches. (Alias to `git flow bugfix`)'
+                'publish:Publish bugfix branch to remote.'
+                'track:Checkout remote bugfix branch.'
+                'diff:Show all changes.'
+                'rebase:Rebase from integration branch.'
+                'checkout:Checkout local bugfix branch.'
+                'pull:Pull changes from remote.'
+                'rename:Rename a bugfix branch.'
+            )
+            _describe -t commands 'git flow bugfix' subcommands
+            _arguments \
+                -v'[Verbose (more) output]'
+        ;;
+
+        (options)
+            case $line[1] in
+
+                (start)
+                    _arguments \
+                        -F'[Fetch from origin before performing finish]'\
+                        ':bugfix:__git_flow_bugfix_list'\
+                        ':branch-name:__git_branch_names'
+                ;;
+
+                (finish)
+                    _arguments \
+                        -F'[Fetch from origin before performing finish]' \
+                        -r'[Rebase instead of merge]'\
+                        ':bugfix:__git_flow_bugfix_list'
+                ;;
+
+                (delete)
+                    _arguments \
+                        -f'[Force deletion]' \
+                        -r'[Delete remote branch]' \
+                        ':bugfix:__git_flow_bugfix_list'
+                ;;
+
+                (publish)
+                    _arguments \
+                        ':bugfix:__git_flow_bugfix_list'\
+                ;;
+
+                (track)
+                    _arguments \
+                        ':bugfix:__git_flow_bugfix_list'\
+                ;;
+
+                (diff)
+                    _arguments \
+                        ':branch:__git_branch_names'\
+                ;;
+
+                (rebase)
+                    _arguments \
+                        -i'[Do an interactive rebase]' \
+                        ':branch:__git_branch_names'
+                ;;
+
+                (checkout)
+                    _arguments \
+                        ':branch:__git_flow_bugfix_list'\
+                ;;
+
+                (pull)
+                    _arguments \
+                        ':remote:__git_remotes'\
+                        ':branch:__git_branch_names'
+                ;;
+
+                *)
+                    _arguments \
+                        -v'[Verbose (more) output]'
+                ;;
+            esac
+        ;;
+    esac
+}
+
 __git-flow-config ()
 {
     local curcontext="$curcontext" state line
@@ -370,6 +488,17 @@ __git_flow_feature_list ()
     _wanted features expl 'feature' compadd $features
 }
 
+__git_flow_bugfix_list ()
+{
+    local expl
+    declare -a bugfixes
+
+    bugfixes=(${${(f)"$(_call_program bugfixes git flow bugfix list 2> /dev/null | tr -d ' |*')"}})
+    __git_command_successful || return
+
+    _wanted bugfixes expl 'bugfix' compadd $bugfixes
+}
+
 __git_remotes () {
     local expl gitdir remotes