Latest round of fixes per RM and AL.  Fix bugs found in man.c.

*** 26,35 ****
--- 26,36 ----
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /*
   * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   */
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <sys/param.h>
*** 174,193 ****
  static void
  sbuf_need(struct sbuf *sbuf, int nchars)
  {
          char *new_content;
          size_t size, cntsize;
  
!         /* Double the size of the allocation until the buffer is big enough */
!         while (sbuf->end + nchars > sbuf->last) {
                  size = sbuf->last + 1 - sbuf->content;
!                 size *= 2;
                  cntsize = sbuf->end - sbuf->content;
  
!                 new_content = (char *)malloc(size);
!                 (void) memcpy(new_content, sbuf->content, cntsize);
!                 free(sbuf->content);
                  sbuf->content = new_content;
                  sbuf->end = new_content + cntsize;
                  sbuf->last = new_content + size - 1;
          }
  }
--- 175,202 ----
  static void
  sbuf_need(struct sbuf *sbuf, int nchars)
  {
          char *new_content;
          size_t size, cntsize;
+         size_t grow = 128;
  
!         while (grow < nchars) {
!                 grow += 128;    /* we grow in chunks of 128 bytes */
!         }
! 
!         /* Grow if the buffer isn't big enough */
!         if (sbuf->end + nchars > sbuf->last) {
                  size = sbuf->last + 1 - sbuf->content;
!                 size += grow;
                  cntsize = sbuf->end - sbuf->content;
  
!                 if ((new_content = realloc(sbuf->content, size)) == NULL) {
!                         perror("realloc");
!                         if (tempfile[0] != '\0')
!                                 (void) unlink(tempfile);
!                         exit(1);
!                 }
                  sbuf->content = new_content;
                  sbuf->end = new_content + cntsize;
                  sbuf->last = new_content + size - 1;
          }
  }
*** 257,278 ****
   */
  static int
  no_page_exists(char *dir, stringlist *names, char *suffix)
  {
          char    path[MAXPATHLEN];
          size_t  i;
  
          for (i = 0; i < names->sl_cur; i++) {
!                 (void) snprintf(path, MAXPATHLEN, "%s/%s.%s.gz",
!                     dir, names->sl_str[i], suffix);
!                 if (access(path, F_OK) < 0) {
!                         path[strlen(path) - 3] = '\0';
!                         if (access(path, F_OK) < 0)
!                                 continue;
!                 }
                  return (0);
          }
          return (1);
  }
  
  /* ARGSUSED sig */
  static void
--- 266,288 ----
   */
  static int
  no_page_exists(char *dir, stringlist *names, char *suffix)
  {
          char    path[MAXPATHLEN];
+         char    *suffixes[] = { "", ".gz", ".bz2", NULL };
          size_t  i;
+         int     j;
  
          for (i = 0; i < names->sl_cur; i++) {
!                 for (j = 0; suffixes[j] != NULL; j++) {
!                         (void) snprintf(path, MAXPATHLEN, "%s/%s.%s%s",
!                             dir, names->sl_str[i], suffix, suffixes[j]);
!                         if (access(path, F_OK) == 0) {
                                  return (0);
                          }
+                 }
+         }
          return (1);
  }
  
  /* ARGSUSED sig */
  static void