wget: Disable pod2man dependency for Linuxbrew
wget: Disable pod2man dependency for Linuxbrew

pod2man conflits with perl, which provides pod2man.

LinuxbrewTestBot/homebrew-core,Linuxbrew/homebrew-core,rwhogg/homebrew-core,Linuxbrew/homebrew-core,forevergenin/homebrew-core,maxim-belkin/homebrew-core,forevergenin/homebrew-core,maxim-belkin/homebrew-core,LinuxbrewTestBot/homebrew-core,rwhogg/homebrew-core