commit https://github.com/vim/vim/commit/f3654827368e6204608036353a0360e9e7c21e02 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Mar 4 22:12:23 2016 +0100 patch 7.4.1486 Problem: ":loadplugin" is not optimal, some people find it confusing. Solution: Only use ":packadd" with an optional "!".

/* auto/if_perl.c */
int perl_enabled(int verbose);
void perl_end(void);
void msg_split(char_u *s, int attr);
void perl_win_free(win_T *wp);
void perl_buf_free(buf_T *bp);
void ex_perl(exarg_T *eap);
void do_perleval(char_u *str, typval_T *rettv);
void ex_perldo(exarg_T *eap);