Rename getline() to procmail_getline() to avoid namespace clash with
POSIX getline(). Fixes FTBFS.

Copied from Debian:
http://sources.debian.net/src/procmail/3.22-24/debian/patches/24/

References:
http://bugs.debian.org/549426

--- a/src/fields.c
+++ b/src/fields.c
@@ -110,16 +110,16 @@
 		    /* try and append one valid field to rdheader from stdin */
 int readhead P((void))
 { int idlen;
-  getline();
+  procmail_getline();
   if((idlen=breakfield(buf,buffilled))<=0) /* not the start of a valid field */
      return 0;
   if(idlen==STRLEN(FROM)&&eqFrom_(buf))			/* it's a From_ line */
    { if(rdheader)
 	return 0;			       /* the From_ line was a fake! */
-     for(;buflast=='>';getline());	    /* gather continued >From_ lines */
+     for(;buflast=='>';procmail_getline());	    /* gather continued >From_ lines */
    }
   else
-     for(;;getline())		      /* get the rest of the continued field */
+     for(;;procmail_getline())		      /* get the rest of the continued field */
       { switch(buflast)			     /* will this line be continued? */
 	 { case ' ':case '\t':				  /* yep, it sure is */
 	      continue;
--- a/src/formail.c
+++ b/src/formail.c
@@ -819,7 +819,7 @@
       { if(split)		       /* gobble up the next start separator */
 	 { buffilled=0;
 #ifdef sMAILBOX_SEPARATOR
-	   getline();buffilled=0;		 /* but only if it's defined */
+	   procmail_getline();buffilled=0;		 /* but only if it's defined */
 #endif
 	   if(buflast!=EOF)					   /* if any */
 	      goto splitit;
--- a/src/formisc.c
+++ b/src/formisc.c
@@ -115,7 +115,7 @@
   buf[buffilled++]=c;
 }
 
-int getline P((void))			   /* read a newline-terminated line */
+int procmail_getline P((void))			   /* read a newline-terminated line */
 { if(buflast==EOF)			 /* at the end of our Latin already? */
    { loadchar('\n');					  /* fake empty line */
      return EOF;					  /* spread the word */
--- a/src/formisc.h
+++ b/src/formisc.h
@@ -17,4 +17,4 @@
 char*
  skipwords P((char*start));
 int
- getline P((void));
+ procmail_getline P((void));
849c7df18f9f63caf'>root</a>/<a href='/guix/log/gnu?id=baaed6fd683257928a09a67849c7df18f9f63caf'>gnu</a>/<a href='/guix/log/gnu/packages?id=baaed6fd683257928a09a67849c7df18f9f63caf'>packages</a>/<a href='/guix/log/gnu/packages/ntp.scm?id=baaed6fd683257928a09a67849c7df18f9f63caf'>ntp.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/ntp.scm?id=baaed6fd683257928a09a67849c7df18f9f63caf&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-05-22 16:04:58 +0200'>2021-05-22</span></td><td><a href='/guix/commit/gnu/packages/ntp.scm?id=c1947a8c7df950d19d10df44e683b8860b14b321'>gnu: ntp: Prepare for GCC 10.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ntp.scm (ntp)[source](patches): New field.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-05-13 16:50:50 +0200'>2021-05-13</span></td><td><a href='/guix/commit/gnu/packages/ntp.scm?id=71127538acf4915617a7e5fb91703287248b10f5'>gnu: chrony: Update to 4.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ntp.scm (chrony): Update to 4.1.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-12-13 00:35:50 +0100'>2020-12-13</span></td><td><a href='/guix/commit/gnu/packages/ntp.scm?id=9faee1e64585e99ff2a93fe65ed26a0a28c46ca1'>gnu: openntpd: Update to 6.8p1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ntp.scm (openntpd): Update to 6.8p1.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-10-13 23:48:15 +0200'>2020-10-13</span></td><td><a href='/guix/commit/gnu/packages/ntp.scm?id=9e1f5a263e4f6df4d075901c9b58a56f80c8b452'>gnu: libcap: Make 'libcap/next' the default libcap.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/avahi.scm (avahi)[inputs]: Refer to LIBCAP-2.31 instead of LIBCAP.
* gnu/packages/base.scm (coreutils)[inputs]: Likewise.
* gnu/packages/linux.scm (libcap): Rename to ...
(libcap-2.31): ... this.
(libcap/next): Rename to ...
(libcap): ... this.
(libcap/next): Define as deprecated alias for LIBCAP.
(fakeroot)[inputs]: Change from LIBCAP/NEXT to LIBCAP.
* gnu/packages/ntp.scm (chrony, ntp)[inputs]: Likewise.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-10-08 15:57:30 +0200'>2020-10-08</span></td><td><a href='/guix/commit/gnu/packages/ntp.scm?id=6072182b3d9debaa126a6e4a3ac45eab9c28e20c'>gnu: chrony: Support Network Time Security (NTS).</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ntp.scm (chrony)[inputs]: Add gnutls.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-10-08 15:57:30 +0200'>2020-10-08</span></td><td><a href='/guix/commit/gnu/packages/ntp.scm?id=f73e09b2c812eb0c348f7605b49ce6d19ec8bb4a'>gnu: chrony: Update to 4.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ntp.scm (chrony): Update to 4.0.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>