* protoize.c: Include gansidecl.h.
	(my_execvp): Delete.
	(choose_temp_base,pexecute,pwait): Declare.
	(PEXECUTE_{FIRST,LAST,SEARCH}): Define.
	(execvp): Delete decl.
	(usage): Fix typo.
	(gen_aux_info_file): Rewrite to use pexecute/pwait.

From-SVN: r12267