vimrc, vimplugrc: welcome back, native vim package management is a nightmare

vimrc

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+set nobackup nomodeline backspace=indent,eol,start foldmethod=marker cursorline
+set list listchars=tab:\|_,nbsp:x,trail:*
+set hlsearch incsearch ignorecase smartcase
+set scrolloff=3 sidescrolloff=15 sidescroll=1
+set tabstop=3 softtabstop=4 shiftwidth=4 smarttab expandtab autoindent
+set wildmenu showcmd ruler laststatus=2
+set statusline=[%F]\ %R%H%W%M\ %=[%{&fenc}/%{&ff}]\ %y\ [%4l/%L:%3v]
+set belloff=all colorcolumn=80 formatoptions+=j relativenumber breakindent
+set keymap=russian-jcukenwintype iminsert=0 imsearch=0
+set title titlestring=[%{hostname()}]\ %t\ -\ vim
+
+let g:sh_indent_case_labels = 1
+let g:netrw_liststyle = 3
+let g:netrw_banner = 0
+
+" plugins
+let plugrc = expand('$HOME/.vimplugrc')
+let plugdir = expand('$HOME/.vim/plugged')
+if filereadable(plugrc) && v:version >= 703
+    execute 'source' fnameescape(plugrc)
+endif
+
+if $TERM =~ '^screen'
+    set t_ts=k t_fs=\
+endif
+
+if has('gui_running')
+    set guifont=Fantasque\ Sans\ Mono\ 11
+    set guicursor=a:blinkon0,a:block,i:ver1-Cursor/lCursor,r:hor1-Cursor/lCursor
+    set guiheadroom=0 guioptions=aeim mouse=a
+
+    map <S-Insert> <MiddleMouse>
+    map! <S-Insert> <MiddleMouse>
+else
+    set mouse=
+endif
+
+syntax on
+filetype plugin on
+
+map <Space> <NOP>
+let mapleader="\<Space>"
+noremap <F1> <Esc>
+noremap! <F1> <Esc>
+nnoremap <Leader>l :setlocal list!<CR>
+nnoremap <Leader>c :setlocal cursorline!<CR>
+nnoremap <Leader>w :setlocal wrap!<CR>
+noremap <Leader>/ :noh<CR>
+noremap <Leader>y "+y
+noremap <Leader>d "+d
+noremap <Leader>p "+p
+noremap <Leader>P "+P
+noremap q <NOP>
+nnoremap <Leader>q :q<CR>
+nnoremap <Leader>s :w<CR>
+noremap <Leader>e :Explore<CR>
+noremap! <C-@> <C-^>
+noremap! <C-Space> <C-^>