add comment in mod_imap for all the monkey patching and performance issue fixings
add comment in mod_imap for all the monkey patching and performance issue fixings

gaubert/gmvault,guaycuru/gmvault,guaycuru/gmvault,gaubert/gmvault,guaycuru/gmvault,erdincay/gmvault,gaubert/gmvault,erdincay/gmvault,erdincay/gmvault